History of Sanskrit

Where did Sanskrit come from?

Sanskrit is an Indo-Aryan language and also the primary religious language used in Hinduism, Jainism and Buddhism.

8 Amazing Facts About Sanskrit

  1. Sanskrit is included in the 22 scheduled languages of India and is also the official language of Uttarkhand.
  2. Sanskrit as a language holds an important place alongside other founding languages such as Greek and Latin.
  3. It holds an important place in India, similar to that of Latin and Greek in Europe.
  4. Sanskrit has had a significant influence on most modern languages of the Indian subcontinent, primarily in India, Pakistan, Sri Lanka and Nepal.
  5. The pre-Classical form of Sanskrit is known as Vedic Sanskrit, with the language of the Rigveda being the oldest and most archaic dating back to as early as 1500 BCE. Rigvedic Sanskrit is therefore documented as one of the oldest Indo-Iranian languages, and also one of the earliest members of the Indo-European language family, the family which includes English and most European languages.
  6. Sanskrit even today is widely used during Hindu ceremonial rituals and Buddhist practices in the form of hymns and mantras. Spoken Sanskrit is still used in a few traditional institutions in India and several attempts are being made for its revival.
  7. The oldest surviving Sanskrit grammar is in Panini’s “Eight-Chapter Grammar” which is essentially an authority defining correct Sanskrit.
  8. Knowledge of Sanskrit marked the fact that a person belonged to a certain social class. Sanskrit then, was mainly taught to members of higher castes, through close analysis of the works of Sanskrit grammarians such as Panini.

For more such interesting history articles and videos, go to this page.

History of Latin

Origin of the Latin Language

Latin is an Italic language which originated in the Italian peninsula, and was originally spoken in Latium and Ancient Rome located along the Mediterranean Sea.

  • Similar to most European languages, Latin is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the church speak it fluently, and many schools and universities continue to teach it.
  • Latin is used even now in the creation of new words in modern languages, including English. Latin vocabulary is used in science, academia, and law.
  • A standard, more literate form gained popularity through speeches by the educated during the later stages in the Roman Republic which is now referred to as Classical Latin. Classical Latin however slowly changed with the decline of the Roman empire, as education and wealth became ever scarcer.
  • In terms of vocabulary, Latin has a tendency to preserve the original forms of many Indo-European roots. Languages such as Sanskrit, however, tend to be more conservative with regards to grammar.

What is a Pulley?

Learn about pulleys with this interactive video lesson on pulleys, for kids.

How to make a Pulley?

Learn how simple physics helps make everyday life easier. Make your own pulley system at home. You will need some wire, thread, a spool, a hook and a bucket filled with toys or other materials. After assembling the pulley, first try and lift the bucket with your hands, and then again try lifting it with the pulley. Which one is easier?

Sometimes, it’s not easy to lift heavy objects with only human force. This problem can be fixed with the help of a simple machine like a pulley.

What is a Pulley made of?

A basic pulley comprises of a wheel on a fixed axle, with a groove along the edges to guide a rope or cable.
Here,
Load = the weight of an object
Effort = the amount of force required to lift or move this object.

When you put two or more wheels together, and run a rope around them, you have created a great lifting machine.

As you add more pulleys, you increase your mechanical advantage and it becomes very easy to lift the same load.

The trade-off is that as you increase the number of pulleys, you require a greater amount of rope to achieve the same result. Since you have decreased the effort needed to lift the load, you have to apply the force for a longer period of time.

For instance, it takes more effort to lift the load in a one pulley system. In a three pulley system it takes less effort, and it takes still lesser effort to lift the load in a five pulley system.

Activity

Where do you notice a pulley around you? Hint- you use one in a building.

Looking for more physics articles and videos? Go to: Physics for Kids.

Pandya Dynasty

Pandya Dynasty: Kingdoms of South India

One of the three ancient kingdoms in the south of India was the Pandyan Kingdom who ruled over Tamil Nadu until the end of the fifteenth century.

Korkai, a seaport on the southernmost tip of India was initially their capital, but then later the capital was moved to Madurai.

The Pandyan Empire was established by the Emperor Kadungon in the sixth century. He ascended the throne after defeating the clan of Kalabhras.

The Pandyas grew in strength and expanded their kingdom. Tamil Nadu was divided between the Pallavas and the Pandyas. The river Kaveri acted as a boundary between the two kingdoms.

The Pandyas controlled the districts which are known as Madurai and Tirunalveli today as well as parts of Southern Kerala.

The Pandyas were best known for their extensive trade network which spread as far as Rome and Greece. They excelled in trading though the seas from Dhanushkodi, the sea shore of Ramanathapuram, and Poompuhar, a city which was used to trade with China, Malaysia, Maldives and other. The Pandyas controlled the pearl fisheries along the South Indian coast between Sri Lanka and India, producing some of the finest pearls known.

The Pandyan Kingdom was a powerful kingdom, but were often subdued during clashes with the Pallavas and the Cholas. This happened because as their kingdom expanded, their neighbors, feeling threatened by them, attacked.

The Pandyas were soon overshadowed by the Cholas during the rule of Parantaka Chola II. His son, Aditya Karikala and his army went to war with Vira Pandya, defeating him in battle. Sinhalese forces (Sri Lankan) came to the Pandyas’ rescue, but even with their help, the Pandyas were defeated. The Pandyan Kings were driven out of their strongholds, and sent to Sri Lanka, where they sought refuge. This was the beginning of a long period in exile for the Pandyas.

Their kingdoms were taken over by Chola Viceroys who called themselves Chola Pandyas and they ruled from Madurai from 1020 AD.

In the thirteenth century, the Cholas had become very weak and were fast losing control of their lands. The Pandyas in the meantime emerged from hiding and expanded their territory from the Telegu lands by the Godavari to the northern half of Sri Lanka.

The two kings who revived Pandyan glory were Maravarman Sundara Pandya and his successor, Jatavarman Sundara Pandya. Jatavarman was a brave and ambitious king. His main goal was to subdue the Cholas completely. He fought many battles and managed to consolidate his hold over Trichi, Srirangam, Tanjore and Kumbakonam.

Maravarman Kulasekara Pandya I, was another Pandyan king who tried to revive Pandyan glory. But after his death, his two sons, Sundara Pandya and Vira Pandya fought against each other for the throne. A general of the Delhi Sultanate took advantage of this chaos and raided the kingdom, which brought an abrupt end to Pandyan rule.

Later on, the Pandyas were nothing more than local chieftains who owned some land around Tirunalveli.

How to Draw A Dragon

In this simple step by step guide learn how to draw a dragon in a simple and interactive way. You just need a red pen and a paper to start drawing a dragon in the next 2 minutes!

20 Steps to draw a Dragon

  1. Draw a circle.
  2. Extend it to make the dragon’s mouth.
  3. Draw an eye.
  4. Add detail to its mouth to make it look real.
  5. Draw a webby tuft.
  6. Make its body. Give it a long neck and tail.
  7. Make its legs short, front and back.
  8. Erase lines as shown.
  9. Add folds to its body to make it look real.
  10. Erase lines as shown.
  11. Add a tuft on top of its head.
  12. Erase lines as shown to make an ear, horns and teeth.
  13. Add a nostril and detail to its snout.
  14. Add spines to its back.
  15. Draw its wing.
  16. Erase overlapping spines.
  17. Add detail to the wing.
  18. Show the other wing partially.
  19. Add nails to its feet.
  20. Make a background with grass, trees and a cloud.

More about Dragons –
Has there been proof that dragons existed? Let’s find out in our video.
For more such cool How To Draw videos go to our Drawing for kids page.

Fingernails

What are fingernails made of?

A nail is a protective covering on the tip of your finger which is made of a tough protein called keratin. Keratin is also the protein that hair is made of. A nail’s main function is to protect the soft tissues on the upper side of your fingertip and counter the pressure applied on the soft part of the finger. This rigidity allows for more precise yet delicate movement and functionality. A nail can also be used as a tool.

The average human nail grows 36 mm per year but this largely depends on age, gender, season, the amount of exercise you do, diet, and hereditary factors. An interesting fact to know about nails is that they grow faster in hot climates than in cold ones and fingernails grow approximately four times faster than your toenails. The only part of the nail that conducts biochemical activity, and can therefore be termed ‘living’, is part of your nail is under the skin.

Looking for more biology articles and videos? Go to: Biology for Kids.

How To Draw A Shark

In this simple step by step guide learn how to draw a shark in a simple and interactive way. You just need a red pen and a paper to start drawing a shark in the next 2 minutes!

13 Steps to draw a Shark

  1. Draw a pointy oval.
  2. Extend it to continue the shark’s body and tail.
  3. Draw the shark’s mouth.
  4. Add details to its face for realism.
  5. Make its nose and eye.
  6. Draw its fins. The middle one should be the biggest.
  7. Add two similar looking fins in the front.
  8. Erase lines as shown.
  9. Shade its eye to give it a menacing look.
  10. Add some wicked looking teeth.
  11. In the background, you can make a small scared looking fish.
  12. Watch it swim away fast from the shark in the video.
  13. Colour your shark and put it up in your room for visitors to look at.

For more such cool How To Draw videos go to our Drawing for kids page.

How To Draw A Bear

In this simple step by step guide learn how to draw a bear in a simple and interactive way. You just need a red pen and a paper to start drawing a bear in the next 2 minutes!

12 Steps to draw a Bear

  1. Draw a curved line for the top part of the bear’s face.
  2. Next, make a circle below it for its noes and mouth.
  3. Draw its ears and eyes.
  4. Shade its nose and add some teeth to its mouth.
  5. Draw another circle for its body.
  6. Make its legs.
  7. Erase lines as shown.
  8. Draw a small bob of a tail.
  9. Again, erase lines as shown.
  10. Finally, add some details to make it look real.
  11. There! Your bear’s ready.
  12. Colour it in and have fun showing it off to your friends and family. You can even hang it in your room.

For more such cool How To Draw videos go to our Drawing for kids page.

How to Draw A Crab

In this simple step by step guide learn how to draw a Crab in a simple and interactive way. You just need a red pen and a paper to start drawing a Crab in the next 2 minutes!

11 Steps to draw a Crab

  1. Want to make a cute crab? Here’s how to get started.
  2. Draw the crab’s top part and bottom part.
  3. Make its eyes. One should be larger than the other for effect.
  4. Draw its eight legs, four on each side.
  5. Now, draw its claws.
  6. Erase lines as shown.
  7. Add details to its eyes and arms so that it looks real.
  8. Now, it’s time to make the background. Draw a line behind the crab.
  9. Draw pebbles and ripples on the ground.
  10. That’s it! Watch your crab crawl away.
  11. Colour it and hang it up in your room for all to admire.

For more such cool How To Draw videos go to our Drawing for kids page.

How to Draw A Dinosaur

In this simple step by step guide learn how to draw a dinosaur in a simple and interactive way. You just need a red pen and a paper to start drawing a dinosaur in the next 2 minutes!

Aren’t dinosaurs fascinating? Here’s how to make a diplodocus.

10 Steps to draw a Dinosaur

1. Draw the mouth first, extending it to the head and neck, continuing to the body.
2. Draw short, stocky legs and the bottom.
3. Make a long triangular tail.
4. Draw nails on its feet.
5. Make its eyes and add nostrils to make it look real.
6. Make spines on its back.
7. Give it some teeth.
8. Add some spots on its body.
9. In the background, draw a pam tree for the diplodocus’s food.
10. Colour it and get set to show it off to friends and family. You can even add it to your collection of wall paintings.

For more such cool How To Draw videos go to our Drawing for kids page.

How to Draw a Dog

In this simple step by step guide learn how to draw a dog in a simple and interactive way. You just need a red pen and a paper to start drawing a dog in the next 2 minutes!

11 Steps to draw a Dog

  1. Start by making circles for its eyes.
  2. Add a snout.
  3. Make a circle for the nose at the end of the snout.
  4. Shade the nose in and draw its smiling mouth.
  5. Draw a tongue hanging out of its mouth.
  6. Complete its face and draw its body.
  7. Draw its tail and make its legs.
  8. Erase lines as shown.
  9. Draw its ears and shade them.
  10. Add details to make it look real.
  11. So now if you’ve always wanted to own a dog, at least you have a drawing of one! Colour it and show it off to your family and friends.

For more such cool How To Draw videos go to our Drawing for kids page.

How to Draw A Koala

In this simple step by step guide learn how to draw a Koala in a simple and interactive way. You just need a red pen and a paper to start drawing a Koala in the next 2 minutes!

12 Steps to draw a Koala

  1. Draw a circle.
  2. Make the koala’s ears.
  3. Section off the face.
  4. Draw the koala’s front legs with nails and the body.
  5. Draw its eyes.
  6. Draw a big nose and shade it.
  7. Add a huge smile and make its eyebrows.
  8. Add details to its ears to make it look real.
  9. Make a tree trunk for it to hug and extend it to a branch.
  10. Add lines to the tree to make it seem like there’s a hollow.
  11. Add leaves at the top.
  12. Doesn’t your koala look cute? Colour it in to finish it off. Display it to friends and family.

For more such cool How To Draw videos go to our Drawing for kids page.

How to Draw A Lion

In this simple step by step guide learn how to draw a Lion in a simple and interactive way. You just need a red pen and a paper to start drawing a Lion in the next 2 minutes!

10 Steps to draw a Lion

  1. Draw the lion’s face and section it off.
  2. Make its nose, eyes, nose and eyebrows.
  3. Draw its mouth.
  4. Make its ears and mane.
  5. Draw its body and make its tail.
  6. Make its legs and paws. Remember the back ones will only be partially visible.
  7. Erase lines as shown.
  8. Shade the mane.
  9. Watch the lion roar in the video and look ferocious!
  10. Colour it in and hang it on your wall after you have finished showing it off to your friends. Who knows, you could soon see a real lion. Drawing helps you remember the features of a creature, so the practice is sure to come in handy!

For more such cool How To Draw videos go to this page.

How to Draw An Octopus

In this simple step by step guide learn how to draw an octopus in a simple and interactive way. You just need a red pen and a paper to start drawing an octopus in the next 2 minutes!

8 Steps to draw an Octopus

  1. Do octopuses creep you out or fascinate you? They are certainly unusual creatures. Here’s how to draw one.
  2. Draw a curved shape for the octopus’s head.
  3. Make its eyes.
  4. Draw its tentacles, starting from the right. You have to make eight tentacles. Some will be hidden by others.
  5. Draw details on its head and tentacles to make it look real.
  6. Shade its eyes.
  7. Watch it take off!
  8. Colour it and hang it on the wall after you’ve finished showing it off to your family and friends. You can also try our other drawing videos on sea creatures, like starfish or shark.

For more such cool How To Draw videos go to this page.

How to Draw A Starfish

In this simple step by step guide learn how to draw a starfish in a simple and interactive way. You just need a red pen and a paper to start drawing a starfish in the next 2 minutes!

12 Steps to draw a Starfish

  1. Aren’t starfishes fascinating? Here’s how to draw one.
  2. Draw a vertical line and a horizontal line cutting it towards the top.
  3. Add diagonals below.
  4. Draw the starfish’s eyes and top.
  5. Extend the line for the body.
  6. Add details to the body to make it look real.
  7. Erase lines as shown.
  8. Now, it’s time to make the background.
  9. Draw a line behind the starfish.
  10. Draw seaweeds and bubbles.
  11. Watch the starfish smile as it burps a bubble. Doesn’t it look nice, just like you do when you smile?
  12. Colour it in and display it in your collection for friends and family to marvel over.

For more such cool How To Draw videos go to our Drawing for kids page.

How to Draw a Submarine

In this simple step by step guide learn how to draw a submarine in a simple and interactive way. You just need a red pen and a paper to start drawing a submarine in the next 2 minutes!

11 Steps to draw a Submarine

  1. Draw a big oval in the middle of your page.
  2. Draw fin shapes on both sides towards the back.
  3. Draw a propeller at the back, in the middle.
  4. Draw a nose for the submarine and a rectangle on top.
  5. Make a long thin rectangle over it and draw a curve.
  6. Take out an antenna.
  7. Draw a periscope.
  8. Make a dotted line across the middle of the submarine.
  9. Draw small circles for windows.
  10. Make steel plates on its body and add dots to show nails.
  11. Maybe you’ll get a chance to travel in a submarine one day. You can dream of that day when you look at this drawing.

For more such cool How To Draw videos go to our Drawing for kids page.

How To Draw A Tiger

In this simple step by step guide learn how to draw a Tiger in a simple and interactive way. You just need a red pen and a paper to start drawing a Tiger in the next 2 minutes!

15 Steps to draw a Tigar

  1. Draw a circle and section it off.
  2. Make a couple of triangular shapes for ears and add two small triangular shapes inside them.
  3. Draw its eyes.
  4. Draw its nose, mouth and mane.
  5. Make its body.
  6. Draw a long tail.
  7. Make its legs with paws.
  8. Erase lines as shown.
  9. Make its eyebrows and shade its nose.
  10. Add whiskers.
  11. Make stripes on its face and body.
  12. Shade the stripes.
  13. Add a line in the background.
  14. Watch it bound away.
  15. Have you seen a tiger? Even if you haven’t, you can colour the one you’ve made and display it in your room for your visitors to admire.

For more such cool How To Draw videos go to our Drawing for kids page.

How To Draw A Tortoise

In this simple step by step guide learn how to draw a tortoise in a simple and interactive way. You just need a red pen and a paper to start drawing a tortoise in the next 2 minutes!

13 Steps to draw a Tortoise

  1. Draw a curved shape for the tortoise’s shell.
  2. Make its stocky, short legs. The back ones will be partially visible only.
  3. Draw a tail at the back.
  4. Give it two ovals in the front.
  5. Extend them to form the neck.
  6. Give a smile to the tortoise when you make its face.
  7. Draw its eyes and shade them.
  8. Erase lines as shown.
  9. Add lines on its back.
  10. Give nails to its feet.
  11. Add details to make it look real.
  12. Watch it get inside its shell!
  13. Colour it in so that you have a pet that you can hang. Your friends and family will admire your drawing.

For more such cool How To Draw videos go to our Drawing for kids page.

How To Draw A UFO

In this simple step by step guide learn how to draw a UFO (Spaceship) in a simple and interactive way. You just need a red pen and a paper to start drawing a UFO (Spaceship) in the next 2 minutes!

13 Steps to draw a UFO

  1. Draw a long oval.
  2. Make a curved shape below it for the bottom part of the spaceship.
  3. Make a curve on the top.
  4. Erase lines as shown.
  5. Draw small rectangles on the bottom.
  6. Make lines with small circles at the ends from these.
  7. Similarly, draw a rectangle and antenna on the top.
  8. Draw details on the window and UFO to make it seem realistic.
  9. Time to draw an alien!
  10. Draw a pointy head with pointy eyes in the window. Add its body.
  11. Shade its eyes and add detail to its body.
  12. Add some clouds and stars in the background.
  13. Watch it descend towards earth and beam a surprised cow up!

For more such cool How To Draw videos go to our Drawing for kids page.

What is a volcano?

The word volcano originally comes from the name of the Roman god of fire, Vulcan.

Types of volcanoes

Most people think of volcanoes as large shaped mountains. But there are other kinds of volcanoes – Wide Plateaus, fissure vents (Cracks where lava emerges), Bulging dome shapes.

What are volcanoes made of?

Common volcanic gases include –
water vapor                   H2O
carbon dioxide             CO2
sulfur dioxide               SO2
Hydrogen fluoride        HF
Hydrogen chloride       HCL
Hydrogen sulfide         H2S

Difference between magma and lava

Liquid rock is called magma when it is under the earth’s surface and lava after it comes out.

What are some interesting facts about volcanoes?

  • Did you know – 75% of the volcanoes on the Earth are found in an area in the Pacific Ocean known as the Ring of Fire. The biggest known volcano in our solar system is on Mars– called Olympus Mons. Its mouth is 600 kms wide with an elevation of 21 kms.
  • Pumice is a unique volcanic rock (igneous) that can float in water. It can also be used as an abrasive and is sometimes used in beauty salons for removing dry skin.

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

Mount Everest Facts

Where is Mount Everest?

Mount Everest is on the border between China/Tibet and Nepal in the Himalayan Mountains in Asia.

Height :

29,035 feet or 8848 meters

Age :

Over 60 million years old

Who discovered Mount Everest?

Sir George Everest discovered it in 1841. Everest was first named Peak 15. It measured at 29,002 feet in 1856.In 1865, the name ‘Everest’ was given by an international organization called Royal Geographical Society.

Youngest person :

Jordan Romero, age 13, on May 23, 2010 from U.S.A.

Oldest person :

Yuichiro Miura, 80 years old

More strange Mount Everest Facts :

  • Everest grows by about a quarter of an inch (0.25″) every year!
  • 223 people have died trying to climb Everest. Almost all are still on the mountain.
  • Even though Sir George Everest and his team discovered it, Edmund Hillary and Tenzing Norgay were the first pair to reach the peak.

Other high mountains after Mount Everest

1. K2 (8,611 meters)
2. Kangchenjunga (8,586 meters)
3. Lhotse (8,516 meters)
4. Makalu (8,485 meters)
5. Cho Oyu (8,188 meters)

Get more Information:

Panchatantra: The Donkey Monkeys Around

Once, a donkey called Gopu lived in the hills. One day, Gopu was happily munching on the grass of the lush green meadow. Gopu was so engrossed in eating the green patch of grass that he did not notice anything in his surroundings. Suddenly while eating, he lifted his head and was shocked to see Shikari right in front of him. Shikari was a wolf. Gopu realized that he needed to quickly think of an idea or else the wolf would devour him.

At once, Gopu started making sounds, “Oohhh, ahhh, it’s hurting so bad!” Unable to understand anything, Shikari asked him what was wrong. Gopu began to limp and said, “A sharp thorn has pierced through my foot while I was walking on the bushes, now I am in terrible pain, will you please remove it for me?”

“Why do you think I would do that?” asked Shikari, and thought to himelf how foolish the donkey must be. “I am waiting to eat him up and he wants me to remove a thorn from his foot,” thought Shikari.

“Shikari, it is for your benefit that I am asking you to take out the thorn,” said Gopu. “What benefit will I get by helping you?” asked  Shikari.

“The thorn is very big and sharp. When you eat me, it will get stuck in your throat and will hurt you badly.”

Shikari thought for a moment and then agreed to do what Gopu said. Gopu lifted his foot for Shikari, and as soon as Shikari came close to his feet, Gopu kicked Shikari with all his strength and galloped away swiftly.

Shikari was blinded by the force of the kick and he also lost some teeth. “Serves me right. Why did I even listen to the donkey instead of eating him up right away? It is so foolish of me,” Shikari thought to himself, and quietly limped away from there.

For more interesting Panchatantra stories for kids, go to: Panchatantra stories

For other interesting stories for kids, browse though our huge collection of short stories here: Stories for Kids

The Fall of the Roman Empire

By 476 AD the western half of the Roman Empire had collapsed. The Crisis of the Third Century was that the entire Roman system – social, military, economic –collapsed and the empire began disintegrating. This happened due to a number of different reasons:

5 Reasons why Rome fell

  1. Unrest among common people: Roman society was divided into free persons and slaves. The slaves had no rights and had to work very hard for their masters. This caused unrest among them.
  2. Taxes: As the empire expanded, more and more people had to be conscripted into the army. This required money for salaries so people from all the Roman territories were heavily taxed. This caused great unrest and revolt from some parts of the empire who felt disconnected from the Emperor.
  3. Barbarians: The Romans called everyone outside the Roman Empire barbarians and thought they lacked culture and morals. However, they had to sometimes enlist their help in protecting their far-off territories where the tired Roman army could not or would not go. The Barbarians (Germanic tribes such as the Vandals and the Visigoths) not only took over the land they were sent to protect but also weakened the social morals of the troops.
  4. Christianity: the rise of Christianity made people believe that a peaceful life of service was possible and they did not want the join the army. It also taught that all men were created equal in the eyes of God which threw off the balance of slaves and free persons.
  5. Praetorian Guards: the Praetorian guards were a special class of soldiers encamped within Rome charged with protecting high-ranking officials in the city. They misused their special powers by accepting money to assassinate emperors, bullied people under them and on the people whom they were sworn to protect. Their position in society was weakened because of this.

Activity:
Asterix and Obelix is a famous comic book that is based on the rebellion of territories within the Roman Empire. Try and find one of the Asterix and Obelix comic books and learn about the Gaulish rebellion.

For more such interesting history articles and videos, go to this page.

What is Germination?

When a seed is sown into moist soil, it begins to grow. This process is called Germination.

Seed Germination Process :

  1. The seed coat splits.
  2. A tiny root grows downwards and a shoot grows upwards.
  3. This produces a seedling of a plant, which ultimately grows into a new plant.
  4. After some time, the plant bears flowers. The flowers produce fruits and the fruits have seeds in them.
  5. All seeds can germinate when sown in moist soil under suitable conditions to produce new plants.
  6. By natural or man-made processes, these seeds are sown into the ground again and that is how new plants are born.

For more such biology articles and videos, visit: https://mocomi.com/learn/science/biology/

Tenali Raman: Subba Sastry and Sugar

Here’s another great story about Tenali Raman.

Once, there lived a man who was very rich but was a miser. He had a great deal of money but he did not like to spend it on anyone. One day, he was very sad because ants had entered his bowl of sugar. So, he thought of drying the sugar in the sun to drive the ants out. He placed the sugar in a heap on a large piece of paper and kept it out in the sun. But he was worried that his friend, Subba Sastry might come and eat the sugar so he sat and kept watch next to it.

Subba Sastry, who was very fond of sweets in any form, and had seen the rich man keep the sugar out in the sun. He called his son and said, “I am going to the rich man’s porch to talk to him. After five minutes, come running to me, shouting ‘Our cow is dead.’”

After giving his son these instructions, Subba Sastry went to the rich man’s porch and started talking to him. Subba Sastry asked the rich man why he was looking so upset. The rich man replied that he had been having a great deal of losses. Then Subba Sastry asked him what he was drying and the rich man replied by saying that water had fallen into some mud in his garden so he was drying it.

Just then, Subba Sastry’s son came running to the porch shouting, “Our cow is dead! Our cow is dead!” Subba Sastry pretended to be grieving, and as was the custom, picked up one handful of the mud that was actually sugar and put it into his mouth. He picked up another handful and put it in his son’s mouth. The rich man was shocked to see this. He started shouting, “This is not mud! Don’t eat it. This is sugar.” Subba Sastry replied, “No, you told me that this is mud. It tastes like mud, too.” He went on eating till all the sugar was over. The miserly rich man was left sad and grieving over the loss of his sugar.

Moral: If you lie, it can backfire on you.

  • For more interesting Tenali Raman stories for kids, click here
  • For other interesting stories for kids, browse though our huge collection of short stories here.

Panchatantra: Why the Owls became Enemies of the Crows


A long time ago, the birds of a forest called a meeting to elect a new king for themselves. They were dissatisfied with their present king, Garuda, who spent most of his time enjoying in heaven rather than fulfilling his duties as the king ......

A long time ago, the birds of a forest called a meeting to elect a new king for themselves. They were dissatisfied with their present king, Garuda, who spent most of his time enjoying in heaven rather than fulfilling his duties as the king of the birds. So, the birds decided that they would elect some other bird as their king.
After many arguments and heated discussions, the birds finally came to the decision that they would crown the owl as their new king. They started making preparations for the coronation of the newly-elected king of the birds.

Just then, a crow flew in and made an objection to the birds’ selection saying, “You have chosen the owl as the king? What were you thinking? Why, such an ugly bird! He also goes blind during the day! And what’s more, owls are birds of prey. He might just kill one of you and have you for his meal rather than protecting you as his subject. What kind of a king would such a bird make? A peacock or a swan would do much better.”

The birds thought that the crow’s arguments were based on logic. This made them reconsider their decision. They decided to hold another meeting on a later date for the election of the king. The coronation ceremony was postponed.

The owl who was still sitting, ready to be crowned as the king, noticed that suddenly everybody had gone absolutely quiet around him. Since it was day time, the owl could not see anything at all. He started growing restless and a little suspicious too. At last, he asked his attendants why the coronation was taking so long. The attendants replied, “Sir, the coronation ceremony has been postponed. The birds have changed their minds about crowning you as their king, They have all gone back to their homes now. There is nobody here.

The owl was infuriated. “Why?” he asked.

The attendant replied, “A crow put up arguments against the owl family. He said that owls are ugly and are killers.”

The owl lost his temper even more. He said to the crow who was smirking, “You have deprived me of the honour of becoming the king of the birds. So, from now on, the owls will be sworn enemies of the crows. Beware of us.”

The crow realised that his over-smartness had made him an enemy but it was too late now. That is why it is said that you should think twice before you say or do anything.

For more interesting Panchatantra stories for kids, go to: Panchatantra stories

For other interesting stories for kids, browse though our huge collection of short stories here: Stories for Kids

Vikram Betaal: The Three Sensitive Queens

Vikram went back to the tree and mounted Betaal on his shoulders again. Betaal started telling him another story.

The story went like this: King Jaipal had three queens. Each of them was very beautiful, sensitive, and delicate.
One day, the first queen was wounded when a flower from her hair fell on her thigh. Another night, when the king and his second queen were spending time on the terrace, the moonlight burned her skin. The third queen was also no less. Once, she heard someone weeping in the next room, she turned pale and fainted.

Betaal asked Vikram, “Tell me O Wise king! Which among the three queens is most sensitive?” Vikram replied, “The third queen was the most sensitive because in my opinion, those who are sensitive to the suffering of others are sensitive in the real sense of the word.” Betaal was very happy with the answer. He said, “No doubt, you are very intelligent! But, you always make the mistake of breaking your silence. Now, I must fly back to the tree. Goodbye!” Saying this, Betaal flew back to the tree.

Vikram Betaal: The Three Special Brahmins

This is another one of the intriguing Vikram Betaal stories. Once upon a time, there lived a rich Brahmin by the name of Vishnuswamin, who was performing a huge sacrificial rite. He had three sons and each was extremely particular about three specific things. The eldest was fastidious about food, the second about women and the third about beds.

Vishsnuswamin wanted a tortoise for his sacrifice. So, he sent his three sons to get one. They did find one, but each of them refused to touch it and bring it back home, as each claimed to be as fastidious as the other.

A fierce quarrel broke out amongst them and they approached the king and requested him to decide who among them was the most fastidious. The king decided to test them all. He invited the first one to a very special feast prepared very exquisitely. But the first son, refused to touch the food claiming that the he smelt burnt corpses in the rice. On investigation, the king found that the rice was procured from a field near a cremation ground. The king was truly impressed.

He then decided to test the second son by sending an extremely beautiful woman to him. But the second son sent her away saying that she smelt like a goat. On investigation, the king found that she had been fed goat milk in her childhood. The king was impressed by the second’s son’s fine taste in women.

Then he decided to test the third son, by letting him sleep in a bed with seven huge mattresses. In the middle of the night, the third son awoke with a lot of pain and a red bruise on his shoulder. It was found that there was a strand of hair in the bed below the seven mattresses.

The king was extremely impressed by the sensitivity of the third son as well. He could not decide who amongst the three was best, but employed them in his court and decided to use the special skills of the young men in his own interest.

Betaal then asked King Vikram, “Who among the three was the most fastidious? Vikram replied instantly, “The third son! The bruise on his shoulder was a definite evidence of his sensitivity, while the other two sons could have obtained information from elsewhere too.”

As soon as Vikram had finished his answer, Betaal flew back to the tree.

Panchatantra: Brahmadatta, Crab and The snake

Long ago, a youth named Brahmadatta lived in a village. One day, Brahmadatta had to go to the city for some important work. His mother was anxious about her son going alone, so she called him and said, “My dear son, I would advise you not to travel alone. You must take a companion with you so that he can help you if required.”

Brahmadatta replied, “Mother, I am a grown man. I can take good care of myself. Besides, I do not have any companion to take with me.”

“Not to worry! I will arrange a good companion for you,” said Brahmadatta’s mother. She then fetched a crab from the nearby pond and put it into Brahmadatta’s travelling bag. As Brahmadatta did not want to hurt his mother’s sentiments, he kept the crab in a camphor box and set out on his journey.

The journey was long and Brahmadatta got very tired by evening. So, he decided to take some rest under a big banyan tree and soon he went to sleep.

In the hollow of that banyan tree, there lived a snake. Seeing Brahmadatta fast asleep, the snake came down and hid himself in Brahmadatta’s travelling bag. The smell of camphor seemed very nice to the snake and thus, he slithered his way into the camphor box. As soon as he entered the camphor box, the crab sitting inside caught hold of the snake’s neck and killed it.

When Brahmadatta woke up, he was astonished to find a dead snake lying beside him. In his heart, he thanked his mother for giving him the sage advice of taking a companion with him.

  • For more interesting Panchatantra stories for kids, click here.
  • For other interesting stories for kids, browse though our huge collection of short stories here.

7 Continents of The World

Continents are very large landmasses found on Earth. The Earth has seven such continents. They are (from largest in size to the smallest): Asia, Africa, North America, South America, Antarctica, Europe and Australia.

List of Continents in the World

Asia

Asia is the world’s largest and most populous continent on Earth. It covers 30% of the Earth’s land area. Asia hosts about 60% of the world’s current human population. The continent of Europe along with Asia form the world’s largest landmass, Eurasia, however these two continents on land are divided by the Ural mountains which stretch right up to the Caspian Sea. By water, it is bounded on the east by the Pacific Ocean, on the South by the Indian Ocean and on the north by the Arctic Ocean.

Africa

Africa is the second-largest and also the second most populated continent in the world, after Asia. The continent of Africa covers 20.4% of the world’s total land area. Africa has a population of 1 billion which accounts for about 14.72% of the world’s human population. Africa is surrounded by the Mediterranean Sea to its north, the Indian Ocean to the southeast, the Atlantic Ocean to the west and the Suez Canal and the Red Sea in the northwest. Africa is widely regarded to be the continent where humans originated. Africa is located on the equator and experiences a number of climate changes. It is the only continent to stretch from the northern temperate to southern temperate regions.

North America

North America is the third largest continent. It occupies 16.5% of the planet’s land area. In 2008, its population was estimated at nearly 529 million people. It is the fourth most populous continent after Asia, Africa and Europe. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea.

South America

South America is the fourth largest continent in terms of area. It is also the fifth most populous continent after Asia, Africa, Europe and North America. South America is bordered on the west by the Pacific Ocean and to the north and east by the Atlantic Ocean. South America includes 12 independent countries – Argentina, Brazil, Chile, Columbia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela and French Guiana. South America is home to the world’s highest waterfall, the largest river by volume, the longest mountain range, the world’s largest rainforest, the driest place on earth and many other geographical wonders.

Antarctica

Antarctica is the fifth largest continent in area. About 98% of Antarctica is covered by ice that averages about 1.6 kilometers in thickness. It is the coldest, driest and windiest continent. Antarctica is considered a desert, with only 8 inches of rainfall in a year. There are no permanent residents on this island, but only a few thousands of people, who live here at the research stations found across the continent. Temperatures in Antarctica can drop to as low as -89 degrees Celsius. Antarctica is home to a variety of penguin species who have adapted to these harsh conditions. This region is also vital for the survival of the ecosystem.

Europe

Europe by convention, is one of the world’s seven continents divided from Asia by the Ural mountains stretching right up to the Caspian Sea. It is the world’s second-smallest continent by surface area. It covers about 6.8% of the Earth’s surface area. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and the Black Sea to the south east. Europe is the third most populous continent after Asia and Africa, with a population of 733 million, about 11% of the world’s population.

Australia

Australia is the smallest and lowest-lying human-inhabited continent on Earth. As Australia is mostly on a single landmass, it is also referred to as an “island” continent, surrounded by oceans. The continent of Australia also includes nearby islands Tasmania, New Guinea, the Aru Islands, and the Raja Ampat Islands, geologically.
Project:

  • Find out five things each continent is known for geographically. Like South America is known for the Amazon Forest, The Amazon River etc.
  • Which countries form a part of North America?
  • Which country is the largest in terms of area, in Asia?

The History of Movies

A brief history of film timeline

  • The story of the movies begins in the 1870s with Edward Muybridge.
  • He was one of the pioneers of photography and you could even say he is the father of the moving image.
  • He met a man named Leland Stanford who was occupied with a popular question of the day- Is there a moment when all four feet of a horse are in the air during a gallop?
  • Leland asked Muybridge to settle the debate once and for all.
  • In order to do this, Muybridge set up 12 cameras along the edge of a racetrack. Then he attached string across the track that would trigger the shutters on the cameras when the horse touched them.
  • He took the 12 images from the racetrack and copied the silhouettes onto a disc. These images or frames could be viewed in succession on a machine that he had invented called the Zoopraxiscope that made it seem like the images themselves were moving.
  • It is considered the stepping stone to motion pictures as we know it.
  • The very next year Thomas Edison, founder of the Edison Laboratory and inventor of the lightbulb, laid his eyes on this machine.
  • He immediately set his company’s photographer William Dickinson onto the task of creating a machine that would allow you to see more than just 12 images in succession.
  • What William Dickinson came up with at Edison Labs was revolutionary- the kinetoscope.
  • With this machine you were able to take many photographic negatives one after the other and display them very quickly producing a moving image.
  • Then inventors around the world began to develop cameras that could record multiple frames in 1 second and the cinema was born!
  • Technology has come a long way since the Zoopraxiscope, with high-speed cameras that can record thousands of frames per second.
  • So now you know- when you’re watching a movie, what you are actually seeing is actually many photographs one after the other!
  • Find a digital camera and ask your friend to complete one action extremely slowly. Try and get at least 30 pictures of this one action. Put it onto your computer and flip through them. What do you get?

Related Articles:
Learn more about the history of Television Invention.
Ever wondered how 3D films work?

What are Comets?

Comets are small celestial bodies. Scientists cannot seem to agree on whether comets are dirty snowballs or snowy dirtballs because of the mixture of ice, gas and dust that they comprise. They are different from asteroids because they are huge balls of ice and gas. Comets are said to originate from the Oort cloud, a group of icy bodies in the outer solar system. They have remained largely unchanged since they formed, which is why scientists are very fascinated with them and the ancient material they carry.

Origin of comets and asteroids

Unlike meteoroids and asteroids, comets have been known to humanity since we were able to record our past- probably because of their distinct shape and tail and the fact that they would appear from nowhere and disappear just as mysteriously. Early sightings of comets have been recorded in various cultures around the world and were considered bad omens- such as the death of nobility, famine or even attacks from the heavenly realm.

What are comets made of?

1. Nucleus

The solid ball of the comet is known as the nucleus or core. It mostly consists of ice, dust and dark organic matter with the ice comprising mostly of frozen water. The frozen material can also be methane, ammonia or carbon dioxide.

2. Coma

When a comet nears the sun, the frozen parts of the comet begin to turn to gas. The gas forms a cloud around the nucleus that is known as a coma. Often this cloud is filled with hydrogen and is then referred to as the hydrogen cloud.

3. Dust Tail

Radiation from the sun also charges the dust particles of the comet causing it to get scattered over up to 10 million km. This dust tail is the most prominent part of the comet seen to the naked eye.

Fun facts about comets

Comets can take anywhere from several decades to a few hundred years to complete one orbit around the sun. When it is closest to the sun it is known as a perihelion and the opposite is called an aphelion. Since the earth is relatively close to the sun we see it during its perihelion. Many comets have been sighted and recorded throughout history. Here are some of the more

3 Famous comets in history

Halley’s Comet- It was last seen in 1986. Its orbit takes 75 years, which means it will next be seen on earth in 2061.

Comet Hale-Bopp – was sighted in 1995. Scientists believed that it would disintegrate during its perihelion, but it survived and should come back around the year 4385.

Comet Lovejoy – is the most recently discovered comet. It was first sighted by Trey Lovejoy in Australia on November 27th 2011.

No matter what the direction of the comet, its tail will always point away from the sun. Can you find out what makes this happen?

Tagline: Zipping muddy snowballs

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

What is an Earthquake?

An earthquake takes place when two blocks of the earth suddenly slip past one another. The surface where they slip is called a Fault place.

The location below the earth’s surface where the earthquake starts is called the hypo center, and the location directly above it on the surface of the earth is called the epicenter.

Sometimes an earthquake has foreshocks. These are smaller earthquakes that happen in the same place before a larger earthquake takes place. The largest main earthquake is called the main shock. Main shocks are always followed by aftershocks that occur in the same place and can continue for weeks, months and even years after the main shock.

What causes earthquakes and where do they happen?

The earth has four major layers: the inner core, outer core, mantle and crust. The crust and the top of the mantle make up a thin skin on the surface of our planet. But this skin is not all in one piece. It is made up of many pieces covering the surface of the earth.

These pieces are called tectonic plates, and the edges of the plates are called the plate boundaries. These pieces keep moving around slowly, sliding past one another and bumping into each other.

These plate boundaries are made up of many faults, and most earthquakes around the world occur on these faults.

Why does earth shake during earthquake?

While the edges of faults are stuck together and the rest of the block is moving, the energy that would normally cause the blocks to slide past one another is being accumulated.

When the force of the moving block finally overcomes the friction of the jagged edges of the fault and it breaks free, all that stored up energy is released. The seismic waves shake the earth as they move through it, and when the waves reach the earth’s surface, they shake the ground and anything on it, like our houses and us.

The energy radiates outward from the fault in all directions, in the form of seismic waves- like ripples on a pond.

How are earthquakes recorded?

Earthquakes are recorded by instruments called seismographs. The recording they make is called a seismogram. The seismograph has a base that sets firmly in the ground, and a heavy weight that hangs free.

When an earthquake causes the ground to shake, the base of the seismograph shakes too, but the hanging weight does not. Instead, the string that is hanging, absorbs all the movement. The difference in position, between the shaking part of the seismograph and the motionless part, is what is recorded.

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

What is Friction?

Have you seen someone slip and fall off a chair? Did it make you laugh? Imagine if we were constantly slipping of chairs and beds and stairs… life wouldn’t be very fun, would it?

Thanks to friction, this does not happen. Everything would just keep slipping and falling all over the place if it wasn’t for friction.

How does friction affect motion of an object?

Friction is a force that is created when two surfaces move or try to move across each other. The amount of friction produced during this process depends on the texture of both the surfaces and the amount of contact force pushing the two surfaces together.

Friction always opposes the motion or attempted motion of one surface across another surface. As the two surfaces slide against each other, their contact is anything but smooth. They both grind and drag against each other, producing friction. You will find friction everywhere that objects come into contact with each other.

The force acts in the opposite direction to the way an object wants to slide. When you want to stop your bicycle, you press the brake and your bicycle slows down because of the friction between the brakes and the wheels. If you are running on a playground and hear your friend call you and suddenly want to stop, you can because of the friction between your shoes and the ground.

Friction in solids, liquids and gasses

Friction only happens with solid objects, but you do get resistance to motion in both liquids and gases.(States of Matter)

Different solid objects experience different amounts of friction. An eraser on a glass top table will experience more friction than a coin, which will experience more friction, than an ice cube on the same table.

Why do you think you find it difficult to walk in the house after the floor has just been mopped? Your mother cautions you, saying “Don’t walk around now. The floor is wet, you might slip and fall.” This is because liquid creates a barrier between the ground and your shoes and makes the friction much less.

Less friction means it is harder to stop. It is because of this reason that you hear of many accidents during monsoons. Even though the friction of the brakes is still there, the brakes may be wet, and the wheels are not in as much contact with the ground because of the water. Although liquids offer resistance to objects moving through them, they also smooth surfaces and reduce friction.

With gasses and friction it’s a colliding situation, not a sliding one. If the gas is air it is referred to as air resistance. The friction in liquids and gases is due to the property called “viscosity.” A gas, or more particularly a liquid, is described as “viscous” when it resists flow, either of itself or of an object through it. Water is more viscous than air, while honey or treacle is more viscous than water.

Slide a coin across a marble floor and then slide the same coin across a concrete pavement. What difference do you notice? Why does this happen?

For more such interesting physics videos and articles visit our Physics for Kids category.

Parts of a Microscope – Facts about Microscope – Part II

Parts of a Microscope and their Functions

LIGHT

In order to see anything in the world you require light. By throwing light on an object you can easily make out minute details. This is also true on the microscopic level and why specimens must be mounted onto glass. The light source is normally below the stage.

STAGE

The stage is where you place the specimen that you want to examine. The glass plate with the specimen on it is mounted onto the stage with the help of slide-clips. The bottom of the stage has a hole that allows light to pass through and light up the specimen.

All mechanical stages can move front and back, on the x-axis and sideways, on the y-axis so you can focus on different parts of what you are looking at.

LENSES

The lenses of a microscope are its most important part. The lenses that are mounted above the specimen, are the objective lenses. Most microscopes have 2 or more of these lenses that revolve so you can adjust the magnification by simply turning the lens turret.

The two eyepieces through which you look at your specimen rest at the top of the microscope. A prism at the head or at the bottom of the body splits the image of the specimen into two— one for each eye. These binocular lenses have adjustable magnifications, usually less than the objective lenses.

The eyepieces can magnify a specimen up to 10 times (10X) and the objective lenses can magnify it another 100X. This means that you are seeing objects 1,000X!

ELECTRON MICROSCOPES

In the early 1900s, people began to understand how to manipulate electrons. Experiments with these tiny particles led to the realisation that they could use them to see microscopic things in atomic detail with an electron microscope.

An electron microscope shoots a steady beam of electrons onto a specimen. These electrons will bounce back where they are detected by a sensor. The sensor makes an image by reading the time it took for the electron to return. Using this technique, scientists are able to achieve resolutions of 1,00,00,000X.

Ask your teacher to take you on a special trip to the science lab one day. She is bound to also have some really cool specimens that you can look at.

For more such interesting General Knowledge articles and videos, visit: GK for Kids.

Facts about Microscope – Part I

Pliny the Elder, a thinker and philosopher of ancient Rome, wrote of a transparent crystal, that was thick in the middle and tapered at its edges; that made objects look bigger, if you peered through it. He even noticed that you could burn parchment or cloth if you directed rays of the sun through it. Pliny was talking of none other than the magnifying glass.

It wasn’t until after the invention of spectacles that the idea of using lenses to inspect things that are very small caught on. That was how the microscope was invented. The invention of the optical microscope transformed the field of science because it allowed people to examine the world in microscopic detail.

All microscopes are basically carrying out 3 functions—

1. Magnify an object with the help of lenses
2. Light up the specimen (object) being examined
3. Allow you to focus and make the details of this object visible

For more such interesting General Knowledge articles and videos, visit: GK for Kids.

History of the Indian Rupee

Sher Shah Suri was the guy responsible for the Rupee. His version of 1 Re in 1540 AD weighed 11.5 grams of silver and was divided into 40 copper pieces or paisa.

By the time the British East India Company entered the market in the 1600s, Sher Shah’s silver rupee had already become the standard currency at least in name.

Despite many attempts to bring the Sterling Pound to India, the Rupee grew in popularity and was even exported as a currency to other British colonies.

And when the British government took over the Company territories after the 1857 revolt, the Rupee became the official currency of colonial India, with the head of King George VI featuring prominently on banknotes and coins.

In 1947, India became an independent nation. The currency kept its name but changed visually to account for the birth of this new nation.

The head of the king was replaced with India’s national symbol- the Ashoka lion pillar from Sarnath.

HOW IS THE RUPEE MADE?

  • There are 4 mints that produce legal tender in India. They are in Mumbai, Kolkata, Hyderabad and Noida.
  • Indian banknotes are made of a balsam wood pulp. Cotton fibres are added to pulp to make it more durable than regular paper.
  • The whole note is then infused with gelatin to give it extra strength. Using watermark technology, an image of Mahatma Gandhi is imprinted onto the sheet during the paper making process.
  • Before the paper dries, a silver thread with holographic imagery is woven into it. The watermark and silver thread makes the notes very difficult to replicate.

THE RUPEE SYMBOL

  1. The Rupee symbol is a recent development in the history of Indian currency. Until 2009, the word rupee on a banknote was shortened to ‘Rs.’ to represent Indian currency. The Indian government held a competition for graphic designers to develop a symbol to represent the currency.
  2. The winning graphic was a symbol that looks like the Devanagiri ‘Ra’ as well as the English ‘R.’ The symbol was an instant success and soon became the standard representation of the rupee.
  3. MRPs and advertisements quickly took to using it and in January 2012 the government issued coinage and banknotes that featured the symbol.
  4. Pick a currency, any currency and try and find out how those banknotes are made. (For example, Australia’s currency is made from plastic instead of natural fibers)
  5. Banknotes have markers to ensure that they aren’t fake. Apart from the 2 markers mentioned in the article, can you find out what elements have to be in place for a note to be authentic?

For more such interesting General Knowledge articles and videos, visit: GK for Kids.

Mythical Creatures – Part 2

Mythical creatures gained popularity through literary circulation and story-telling. They are creatures which are believed to be real beings, but there isn’t enough evidence out there to prove that.

List of 5 Popular Mythical Creatures

1. Dragon

The creature called Dragon has two origins, European(derived from European, Greek and Middle Eastern mythologies) and Chinese(derived from Japanese, Chinese, Korean and other East Asian folklore). Common to both origins, the dragon is a huge reptilian, fire breathing creature living in caves, mountains or lakes. While in some cultures they are considered a cause of havoc, in some other cultures they are also a sign of peace and prosperity.

2. Unicorn

The word unicorn comes from the Latin words uni meaning one and cornus meaning horn. A unicorn is said a be a beautiful and pure woodland creature which resembles a white horse with one single spiralling horn protruding from its forehead. Its horn is said to have the power to make poisoned water potable and to heal sickness.

3. Werewolf

A werewolf is a mythical human with the ability to turn into a wolf-like creature. This transformation is often associated with the appearance of a full-moon.

4. Cerberus

In Roman and Greek mythology, Cerberus is a 3 headed dog guarding the entrance to the Underworld. It would only allow people to enter the place of the dead, but never allowed them to leave. Only a few have ever managed to escape from him. Among them was Orpheus, a Greek musician who lulled it to sleep by playing a lyre.

5. Gorgons

The Gorgons were 3 frightful sisters, Medusa, Stheno and Euryale, who had hair of living, venomous snakes. In addition, Medusa is said to have a deadly stare which could turn a person to stone. Stheno had sharp fangs and Euryale was known for her bellowing cries.

For more such mythical creatures also read: Mythical Creatures – Part 1.

What is Currency?

Money, at its most basic level, is an object that simplifies an exchange of goods.

In ancient civilizations, it was a receipt that denoted the amount of grain that you had saved up at the granary.

Since everyone was using the same granary, people were able to exchange these receipts between each other- as if they were actually exchanging barrels of grain.

From the Pharaohs of the fertile crescent to the planners of Mohenjo Daro, people have used some form of currency to value the objects around them.

Since different cultures valued objects differently, the Harappan money may not be worth anything in Mohenjo Daro.

As trade developed between civilizations, there was a need to organize all these receipts that were being exchanged.

A system of banks were created that kept an account of all the grain in storage and the receipts in circulation. Banks would also mark a value of goods in two different currencies to help trade relations.

Before chequebooks and credit cards, kings regulated the money within their domains. They ensured that the banking system was fair to the people using it and that no one was making fake money.

THE BANKNOTE

  • Coins made from precious metals like alloys of gold, silver and copper came before paper money.
  • They were easily countable units of measurement that made it very easy to trade. The coins themselves had a value equal to their weight and size in precious metals.
  • Gold coins were usually used for large transactions like government affairs like wars, silver coins for taxes and trade, and copper coins were usually thrown around at the local market.
  • Paper currency actually grew out of a practice of 7th century Chinese merchants. The royal-issue copper coins were circular and had rectangular holes right in the middle that made them easy to put on a string.
  • The richer merchants who found it hard to carry around their strings of money would give their coins to one person for safe keeping.
  • In return, this trust-worthy person issued the merchant a receipt indicating just how much money he was banking for the merchant.

THE GOLD STANDARD

  • Coins were expensive to produce as it is, so when the king realized that he didn’t have to actually make coins, he issued little paper promises in the form of bank notes that represented the amount of gold in his treasury.
  • By doing this, the king was guaranteeing anybody who presented one of these notes at the treasury, that they would be given its worth in gold.
  • Making the value of your currency equal to its worth in gold, is known as the Gold Standard.
  • But unlike the Rupees of today, the notes of the Tang dynasty were only valid in specific regions of the kingdom and expired after 3 years.

For more such interesting General Knowledge articles and videos, visit: GK for Kids.

How does a Pressure Cooker work?

The sound of a pressure cooker may be startling, but it is a call to you that it is doing its job. Yes! Food will be served soon.

This nifty appliance cuts the amount of time it takes for food to cook. There are 2 very important things happening inside the chamber of a pressure cooker. Let’s break down that process to understand it all—

STEAM AND PRESSURE

A combination of steam and pressure make the pressure cooker this efficient kitchen delight. The two work together to cook things in no time.

One of the reasons we use water to cook food is because it is a better conductor of heat than air is. You can raise the temperature of water to transfer its energy to the water in food. Basically— cooking it.

The boiling point of water is 100°C, but did you know that this is true only under normal atmospheric conditions? This means that if you were trying light a fire under a pot of water on Mt. Everest, the water would begin to boil once it reaches 71°C, because there is less pressure 8,848m above sea level.

A pressure cooker does the opposite of what Mt. Everest does- it increases the pressure so that the water will come to a boil at a point higher than its regular boiling point. Changing the pressure conditions inside a sealed cooker means that the water is able to get much hotter without evaporating and when it finally turns into steam, the moisture-laden air is hotter than the steam that would come out of your tea kettle.

The trapped steam begins to work its magic immediately, since water is a good conductor of heat and all food stuff contains water. However, this is only half of the reason why it takes so little time to cook food inside a pressure cooker.

The increased pressure inside the cooker literally forces heat into the food. Think of the pressure as an invisible hand pushing the extra-hot steam into the very core of the food inside. However, if the pressure is like a crushing hand then why doesn’t the food come out all smashed? Well, this is because the steam applies uniform pressure to all surfaces of the food and that leaves the food un-smashed.

PARTS OF A PRESSURE COOKER

A pressure cooker is made up of a pot, a lid which fits precisely on the pot with a locking mechanism; a rubber ring that goes between the lid and the pot so that no air can escape; a valve on top of the lid with a release whistle.

There are 2 extremely important parts in all pressure cookers. The rubber ring that goes between the pot and the lid, ensures that no air escapes from inside the container; if it did, then the pressure would not be able to build up.

The valve on the top is a safety measure that makes sure the pressure does not build up to dangerous levels inside the pot. This could lead to a potentially dangerous explosion. It is designed to allow some of the steam to escape after the pressure inside reaches a certain point. And with that startling whistle, we know how much the food has been cooked.

Ask your mum how long different foods would take to cook inside a pressure cooker. Ask her to tell you in how many whistles, not actual time. When she is cooking these different foods see how long it actually takes.

Here are the names of different foods you can try:

  • 1 cup of rice
  • 4 potatoes
  • 1 cup of dal

For more such interesting Physics videos and articles visit our Physics for Kids category.

What is Frost?

What is frost?” is a great video for kids to find out more about this phenomenon.

Have you ever walked out early in the morning on a stretch of grass that crunches under your shoes? With every step you take you can hear the distinct sound of something crunching and it actually feels like you are crushing something like eggshells. This is because you are breaking tiny frost columns that built up over the night.

FROST COLUMNS

In cold weather, the temperature of the ground can often drop to below freezing point. The water on the surface of the ground has cooled enough to turn into ice. Water on the ground freezes, more water from inside the soil is pulled to the surface and freezes as well. This process continues until tiny sheets of ice rise up from the ground. These are known as frost columns or needle ice because of their appearance.

The reason that the water from inside the ground gets sucked up to the surface is known as capillary action. This is the ability of liquids to flow in very tiny spaces, without the help of and often in opposition to, gravity. If you put the end of one piece of paper into a glass of water you will notice that the liquid starts moving up. The paper is able to absorb the liquid because of capillary action. In this way, water trapped in the soil moves to the surface of the earth, to build this needle ice.

FROST IN AGRICULTURE

Since all you need for frost to accumulate is water, columns can grow on pretty much any surface. Any solid surface whose temperature drops below freezing has the ability to freeze water vapour around it. It might be exciting to feel the crunch of frost columns under our feet on a particularly cold day, but it is responsible for a lot of damage to crops and fruit.

Take a bowl and fill it with mud. Pack the mud down gently and lightly pour a glass of water onto it. Make sure that the soil is soaked completely through but not mushy. Put the bowl into the freezer for a few hours. When you remove it, the soil should be frozen. Now pour a thin layer of water over this and pop it back in. Do you get ice columns?

Tagline:
Mini walls of ice

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

Indus Valley Civilization

One of the earliest urban civilizations in India and in fact, in the world, was the Indus Valley Civilization, also called the Harappan Culture.

Urban Planning and Architecture

About 5000 years ago, a group of nomads traveling from Sumeria (present-day Iran) entered North Western India, near present day Karachi. These nomads found a land so richly fertile by the banks of the river Indus that they settled there without hesitation. This area was abundant with water, fodder and fuel.

Mohenjo-Daro and Harappa

Over the next thousand years, the immigrants spread over an area of half a million square miles. Excavations prove that the level of urban planning and architecture prevalent here was incomparable. The anchor for this civilization lay in the beautiful twin cities of Mohenjo-Daro and Harappa.

The name Mohenjo-Daro means ‘Mound of the Dead’ in Sindhi. The city was built around 2600 BC and abandoned around 1700 BC. Evidence suggests that the city was highly prone to floods.

These cities were made of bricks – either baked mud of wood bricks. The baked bricks were a superior version of the sun-dried bricks used in other civilizations. The amazing part was that the workers made every brick of the same size. The type of brick used, ensured the durability of the buildings.

Sanitation and Sewerage System

Despite a population of about 30,000, the city had one of the best sanitation systems. Each house had a well from which it drew water. From a bathing room the waste water was directed into covered drains along the main streets. Since all the streets were well-drained, the city remained dry and clean. This is evidence of a very modern method of sanitation and sewerage.

Mohenjo-daro was primarily an agricultural city. It was situated below the great mountain ranges, with rivers flowing abundantly through the land, depositing rich fertile soil. This made evident, the fact that agriculture was the main occupation. Further proof of this is the presence of a large well, a central marketplace and several granaries in the city.

Near the granary was the great public bath house, known as the Great Bath. Steps led down to a pool lined with bricks in a huge courtyard. The beautiful bath area had a layer of natural tar – this was to prevent it from leaking. In the center of the bath area was the swimming pool. The purpose of the Great Bath was assumed to be for ritualistic bathing. This is a practice followed by Hindus even today.

Houses were well protected from noise, odour and thieves. Each house opened out onto inner courtyards and smaller lanes, so it was safe. Although some houses were larger than the others, the city seemed to promote an equal society, for all houses had the same kind of access to water and drainage.

The city had an impressive defense structure in place as well. Though it lacked outer walls, there were defensive towers in the West and South. Since other Indus cities had stronger defense systems in place, it is speculated that perhaps Mohenjo-daro was only an administrative center.

Soil Profile

A vertical section cutting through the soil showing the different layers of the soil is called a ‘soil profile.’ A soil profile can be seen by looking at the sides of a recently dug trench, or while digging a well, or a foundation of a building. It can also be seen at the sides of a road on a hill.

Soil has three different layers or horizons:

1. Top Soil
2. Sub Soil
3. Sub Stratum

1. Top Soil

The top layer of the soil is called the Top Soil. Its properties are as follows:

  • It is the most useful part of the soil.
  • It is dark in color because it is rich in minerals and humus.
  • Plant roots grow in the top soil.
  • Many living things like insects, worms, rodents etc. live in the top soil.
  • Bacteria and Fungi also occur in the top soil.
  • It contains the decayed remains of dead plants and animals, which forms Humus. Humus makes the top soil very fertile.
  • It is soft and porous and can hold a lot of water.
  • Plants get all the minerals required for their growth, from the top soil.

2. Sub Soil

The layer of soil just below the top soil is called the Sub Soil. Its properties are as follows:

  • It is lighter in color than the top soil.
  • It has very little humus.
  • It is made up of slightly bigger rock particles than the top soil.
  • It is harder and more compact than the top soil.
  • It contains very little living organisms.
  • Roots of trees are able to reach the sub soil.
  • It is much less fertile than the top soil, but it is rich in soluble minerals.

3. Sub Stratum

The layer of soil just below the sub soil is called the Sub Stratum. Its properties are as follows:

  • It mainly consists of partially broken or weathered rocks.
  • These rocks keep breaking from the bed rock which is below the sub stratum.

Below the sub stratum we have the bed rock (or parent rock), which is just unweathered solid rock.
It is this bed rock which has produced soil over a long period of time.

Wind, temperature, rainfall, light and humidity are some important climatic factors which affect the soil profile and bring changes in the soil structure.

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

What are Glaciers?

What are Glaciers?

  • Glaciers are massive bodies of flowing ice and are found in regions where it is very cold, like the North and South poles, and in mountain ranges. Snow does not melt in these places because of how cold it is. Instead all the snow piles up. As this happens, it crushes the snow beneath it into ice to forms glaciers. The glaciers slowly move downwards, changing the shape of the area as they go.
  • Glaciers and the snow line- Snow never melts above a certain height. This is called the snow line. Glaciers form above this line and melt below it.

THINGS TO DO

  • Do some research on the Siachen glacier.
  • Why are glaciers important to us as well as the environment?

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

Why is the Sky Blue and Sea Blue?

All objects have the ability to either absorb or reflect light. Different materials will absorb different amounts of light and reflect the rest. Now you may wonder why the sea looks blue but a bucket of water is transparent. Or why the sky above you looks blue but the air around you is transparent.

Why is the sea blue?

In order to completely understand why this happens, you must remember that an object seems to be a specific color because it absorbs all the colors of the visible spectrum except for the color it appears to be. This means that water reflects blue light and absorbs all the rest. Some areas of the sea sometimes appear green but that has to do with how shallow that part is. As you travel deeper under sea you will find that at about 46 meters, most of the blue light is replaced with pitch darkness.

Why is the sky blue?

The sea and other water bodies are large masses of water contained by catchments in the land whereas the sky is all around us. Even the sky, like the sea appears to be many different shades of blue. You can make this comparison because the same effect that takes place in the sea is what makes the sky blue. The trillions upon trillions of water droplets in the atmosphere reflect the blue wavelength of the sun’s rays while absorbing all the rest.

The reason that a bucket of water and the air around us seem clear and transparent is because light is able to penetrate completely through these particles. The quantity of water or air which we are observing is not enough to demonstrate this effect. Doesn’t it make you wonder if only one of them is actually blue and the other one is cheating?

Collect different colored cellophane papers and use them to look at the sky (and sea if possible) what do you notice with the different colors? Does the outcome of your observations change at sunrise and sunset?

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

Hyder Ali (1728-82)

Hyder Ali: King of Mysore

The Wodeyar Dynasty, one of the most prominent dynasties of the south, ruled the Kingdom of Mysore. Hyder Ali and his son, Tipu Sultan make their mark in this region.

Hyder Ali Career

Hyder Ali was born at Budikote around the year 1720. He started off his career as a soldier. He was a petty office in the army and was assistant to the Nizam, who was the Mughal deputy in South India. When the Nizam was assassinated, a lot of confusion followed and in the midst of all the chaos, Hyder Ali’s services attracted the attention of Nanjaraja, the minister of the Raja of Mysore. Hyder Ali received an independent command and over the next 12 years, the minister and the King depended on him and were under his control.

Mysore was left bankrupt under Nanjarana, and it is during this time that Hyder Ali rose in the ranks until he replaced the King.

He extended his empire right up to the lands in the north, beyond the Tungabhadra river. He spent much of him time in building up a strong army to deal with the Marathas in the northwest and the British on the East and West coast.

The Marathas waged four damaging wars against Hyder Ali, but after the death of their leader Peshwa Madhavrao I in 1772, Ali pressed his advantage and extended his territory up to the Krishna river.

Hyder Ali sought the friendship of the British so that they could together defeat the Marathas. The British however had other ideas and wanted to undermine his powers and use him. This led to the First Anglo-Mysore War in 1767. Hyder Ali campaign against the British proved successful, and he got the British to sign a mutual defence treaty with him. The British went back on their word when they were attacked by the Marathas.

In 1780, Hyder Ali waged his second battle against the British. He was defending his kingdom as best as he could, but then suddenly died of cancer.

History of Tipu Sultan

He was succeeded by his son Tipu Sultan whom he had educated and trained well. He was fluent in a number of languages and was a good student of mathematics and science. He had a great appetite for learning. He was also an avid reader and his library was filled with over 2000 books in different languages.

Tipu was given exposure to both military and political affairs at a very young age. By the time he was 15, he father took him along on all his military campaigns. In fact, it was Tipu who headed the First Anglo-Mysore Water, defeating Colonel Braithwaite on the banks of the Coleroon.

In 1772, Tipu was sent to the the North of Mysore to recover territories seized by the Marathas. He gained valuable experience in both warfare and diplomacy there.

During the Second Anglo-Mysore War in 1780, Tipu intercepted the British troops under Colonel Baillie as they moved South. He stopped them before they could join Sir Hector Munro in Kanchipuram.

Colonel Baillie was no match for Tipu and his army. Even when Munro sent reinforcements, they were no match for Tipu’s troops. The British suffered a humiliating defeat. Munro managed to flee while Colonel Baillie was arrested and put in prison.

How Do Batteries Work?

You use them to power a number of appliances at home. You also find them in many of your remote controlled gadgets. Watch this video to learn about that battery that powers your remote controlled car, the TV remote or even your PSP. See what goes into its making and how everything comes together to give you that power.

Can you imagine a world where all electrical appliances have to be plugged in?

Flashlights, cell phones and toys would be tethered to electrical outlets, making them clumsy and inconvenient.

Batteries provide portable, convenient sources of energy for powering devices without wires or cables.

So how do batteries work?

A dry cell is a common type of battery used today. It basically converts stored chemical energy into electrical energy.

In most basic terms, a battery cell is made up of three components:
– An anode (negative charge)
– A cathode (positive charge)
– and the electrolyte

In the dry cell, Zinc is the anode (-), the graphite core is the cathode (+) and Ammonium Chloride paste acts as an electrode.

Due to a chemical reaction within the battery the anode builds up an excess of electrons. This causes an electrical difference between the anode and the cathode. The electrons want to rearrange themselves and displace the extra electrons in the cathode. However, the electrolyte ensures the electrons cannot travel directly to the cathode.

When the circuit is closed (with the help of a “conductive path” between the anode and cathode), the electrons are able to travel to the cathode. This, in turn provides power to any appliance placed along the way.

This is how batteries work.

Over time this electro-chemical process alters the chemical makeup in the anode and cathode and eventually they stop providing electrons.

And this is how a battery “dies.”

Batteries provide us with a mobile source of power, that makes modern conveniences possible.

Head on to Chemistry for Kids for more such interesting chemistry videos and interactive articles.

Christopher Columbus

The Early Life of Christopher Columbus:

Christopher Columbus was born on 31 October 1451 in Genoa, northwestern Italy. He was an explorer, colonizer and navigator. His father Domenico Colombo was a wool weaver who worked both in Genoa and Savona.

His mother was Susanna Fontanarossa who belonged to a very noble family in Lisbon, Portugal. Domenico taught Christopher the skills necessary to follow him into the import and exporting of woven textiles as well as the wine trade.

With his father’s help, Columbus though not scholarly, read books which would serve him well later in life on astronomy, geography and navigation. As a young man, Columbus sailed the Mediterranean, looking after the family business.

In 1476, after six years of being in the trade, Columbus was in the quest to lead a more adventurous life. He travelled to Lisbon and started working for Genoese companies trading with northern Europe. Two years later, he fell in love and married Felipa who gave him his first son, Diego. It is said that Felipa died tragically after giving birth to Diego. Columbus grieved over the passing of his wife, and gave her the best possible funeral he could afford.

In 1484, Columbus approached the Portuguese king, Joao II to help fund an exploration. King Joao’s experts however disagreed with Columbus and denied him his request. The following year, Columbus left Portugal and decided to ask for support from the Spanish King and Queen, Ferdinand and Isabella.

Columbus convinced Queen Isabella that he would find gold that could pay for a crusade to free Jerusalem from the Sacrens (name given to Arabs or Muslims then). Through the funding from the Catholic Monarchs of Spain, he completed four successful voyages across the Atlantic Ocean.

Christopher Columbus Discovers America

During his first voyage in 1492, instead of reaching Japan as intended, Columbus landed in the Bahamas, at a locale he named San Salvador. Columbus through his voyages visited the Greater and Lesser Antilles, as well as the Caribbean coast of Venezuela and Central America, claiming them for the Spanish Empire.

Columbus was not the first explorer to reach the Americas but his voyages certainly led to the first lasting European contact with America. This initiated a period of European exploration and colonization of foreign lands that lasted for several centuries. The Spaniards therefore had a great impact in the historical development of the modern Western world.

Columbus saw his accomplishments primarily in the light of spreading the Christian religion, though it is also said that he had a hunger for amassing wealth.

Columbus’ strained ties with the Spanish crown led to his arrest and dismissal. Columbus died on 20 May, 1506 fighting with the Spaniards over the benefits which Columbus and his heirs claimed were owed to them by the crown.

What are X-Rays?

X-Ray Definition

An X-ray is a form of electromagnetic radiation. Their wavelength is smaller the UV rays and they are therefore invisible to the human eye. Due to this small wavelength, x-rays are able to pass through solid objects. Their ability to penetrate solid objects depends on how dense the material of the object is.

Why does the X-Ray photograph only show bones?

The human body is made up of bones, muscle, skin, tissue and muscles. All these have varying densities where bones are the most tightly packed. When you pass an x-ray through a body, the bones are the only part through which the x-rays are not able to pass. If you place photographic paper on the other side of your body, only those rays which have passed through the body will turn the paper dark. This is why bones show up as white spaces on an x-ray and how doctors can tell if you have an injury to your skeletal structure.

An abdominal X-Ray

So how can we take an x-ray of something like the stomach, if the rays will just pass through them? You will have to drink a special liquid that will change the density of the stomach. This liquid will slow down the x-rays. X-rays are even used to photograph old objects like artifacts and paintings, because we are able to see details, that have been lost by time and corrosion.

How safe are X-Rays?

X-rays are not to be fooled around with. Too much exposure to these tiny waves could result in serious damage to your body. Can you find out what kind of damage x-rays can do to your body over a long period of time?

For more such interesting Physics videos and articles visit our Physics for Kids category.

The Rajputs

History of Rajputs in India

In the 7th and 8th century a group of people emerged who called themselves Rajputs which meant ‘Sons of Kings.’ They were warriors who hailed from Rajasthan and parts of Central India. They belonged to three kinds of ancestries; Suryavanshi, Chandravanshi and Agnivanshi. Under Agnivanshi were the clans of Pratiharas, Solankis, Paramaras and Chauhans. These clans established Kingdoms in Marwar, Ujjain, Malwa, Kannauj, Ajmer and Gujarat.

Rajputs were known for their courage and loyalty. Rajput women were trained for war and did not hesitate to go into the battlefield if their men were outnumbered. However, if the King and all his men were killed in a battle, Rajput women preferred to commit suicide rather than allow themselves to be taken as prisoners. This ritual was known as ‘Jauhar.’

Prithviraj Chauhan: King of India

One of the most prominent Rajput Kings was Prithviraj Chauhan. He ascended the throne at the age of 13, after the death of his father. He was adept at military targets and was known to hit moving targets merely by listening to the sound. He was a romantic, chivalrous and an extremely fearless person. His kidnapping of Princess Sanyogita is legendary. During her wedding to another man, Prithviraj bravely rode into the venue, abducted her and sped away.

Her father’s soldiers chased him but were unable to catch him. He got away and married his beloved.

In the meantime, he spread his empire and controlled most of Rajasthan and Haryana, unifying Rajputs against Muslim invasion. A Muslim conqueror named Mohammad Shahab-ud-din Ghori was capturing nearby kingdoms. As he covered more areas, he became a threat to Prithviraj’s territory.

Prithviraj prepared for war. The two clashed at the First Battle of Tarain. Prithviraj defeated him with his massive army of loyal soldiers. As Ghori retreated, Prithviraj was advised to attack the retreating army. The noble king refused to do so, and this proved to be his undoing as Ghori soon came back with his armies for a second attack.

At the second battle of Tarain, Prithviraj was defeated and captured. It is said that he was tortured and his eyes were blinded with red-hot iron rods. Thereafter in an archery contest, he displayed his skills by hitting targets in spite of being blinded. Ghori is said to have praised him for this feat. On hearing his voice, Prithviraj is believed to have aimed an arrow in his direction that killed his enemy. In 1192 AD, Prithviraj Chauhan died, ending an era of profound bravery, courage and mortality.

Maharana Pratap, Bappa Rawal and Rani Padmini have all made an indelible mark on the pages of Indian history. Maharana Pratap, the ruler of Mewar, is synonymous with Rajput valour and chivalry. He continued his combat against the Mughals and other infiltrators for the rest of his life. Gradually the power of the Rajputs dwindled as they were no match for the Mughals. When the British arrived in India, the Rajput states became colonies, this ending the reign of the Rajputs forever.

For more such interesting history articles and videos, go to this page.

Nutrition in Amoeba

How does Amoeba obtain its Food?

An amoeba eats tiny plants and animals present in pond water where it lives. An amoeba takes in food by extending arm-like structures called pseudopodia from any part of its body, since it is shapeless.

When a food particle comes near the amoeba, then the amoeba produces two pseudopodia around the food particle and surrounds it.

Digestion Process in an Amoeba

The two pseudopodia then join around the food particle and trap it in a food vacuole with a little water. The food vacuole contains digestive enzymes which break down the food into nutrients and undigested waste.

The nutrients from the food are directly absorbed by the body of the amoeba, the cytoplasm. The undigested wastes are simply thrown out of the body through a rupture anywhere in the cell wall. After the nutrients are absorbed, the vacuole disappears.

Looking for more biology articles and videos? Go to: Biology for Kids.

Indian Manuscripts

INTRODUCTION
Indian literature dates back to the courts of monarchs over 5000 years ago. Back then literature was not in the form of written texts as we know it today, but in the form of oral poetry, song, and verse. Classical Indian languages were warehouses of ancient wisdom that were stocked by folklore imagination. The literature of ancient India was based in inquiry into questions about life, death and nature. Even mathematics, astronomy, cosmology and science were keenly inspected. The act of passing down knowledge took place in the gurukuls (schools) of the monarchs of Indian antiquity and is known as the oral tradition.

THE ORAL TRADITION

The body of shared knowledge was passed down from generation to generation in an oral tradition that remained unbroken for centuries, nay- millennia. In fact until quite recently literature reached its audience through performance and experience, which is how even people who do not know how to read and write are very informed about their own culture.

In the oral tradition before written language, long texts of histories and ideas were memorised and passed down from mouth to ear. Each text would use a mnemonic system (an auditory learning aid) to help the memoriser remember such a large volume of knowledge. Every generation made their additions to the body of work but no modifications were made to original texts simply because it would mean changing the tune of the song.

THE WRITTEN TRADITION

Writing played a very important role in the knowledge based societies of ancient times. Documenting became a necessity as civilised life became more complex. Writing was a convenient way of transmitting information and a reliable means of keeping historical records. The representation of language in a textual medium dates at around 4000 BC.

The long texts that were transmitted orally gradually began to be recorded on copper plates, birch, palm leaves, and even paper. The oral tradition continued to be a means of learning the Vedas but has been passed down to us through a large collection of manuscripts.

Sanskrit has no native script because it was spoken in a purely oral society. When it was written the scripts used by regional scribes were used and therefore virtually all major writing systems have been used to create Sanskrit manuscripts. Also, many original Sanskrit texts were translated into many different Indian languages as this tradition of documenting the existing oral tradition was considered essential to propagating knowledge and language.

One of the oldest bodies of text in the world are the Vedas that were created between 1500 – 500 BC. During that time the language of the street was called Vedic. The Vedas are written in Classical Sanskrit, a complex form of Vedic. Around the 4th century a grammarian known as Panini wrote a book called Panniyam, which contained 3,959 linguistic rules. This transformed Classical Sanskrit into what is called Modern Sanskrit.

THE MANUSCRIPTS OF INDIA

India is said to have the largest collection of manuscripts in the world scattered all across the country. Indian manuscripts were written in a variety of languages and scripts that have survived till today. These are in the Grantha, Devanagiri, Nandinagiri, and Telegu scripts and multiple languages. The heritage and history of India is well documented in these treasures.

There is a big difference in the way we store information in the digital age and how the people of ancient India did it. A palm leaf was the most common form of paper. The center rib of a palm frond was removed leaving two strips. The strips were pressed flat and trimmed to one size before being smoothed down by sandpaper.

Scribes would use a sharp instrument to actually carve the writing into the surface of the leaf. The nearly invisible text was made visible by covering the leaf with a black pigment like carbon black. After the leaf was cleaned, the residue remained in these scratches and made the writing visible.

The scribes would delicately write on both sides of the strip of palm leaf. These pages were then bound together by a string either at one end of the strip so it could fan out, or read like a book as we do now. The front and back cover of the manuscript would always be a hard material in order for protection. These covers were most often adorned and sometimes even made of precious materials such as ivory.

ILLUMINATED MANUSCRIPTS

Recording and documenting history and culture was not restricted to the Indian subcontinent. The ancient Egyptians were using a similar technique on papyrus and the Mesopotamians as well. During the rise of Christianity around 400 AD, manuscripts began to feature small images and colourful decoration that would illustrate the text. A text with miniature paintings along with illustrations that framed the text in a box is known as an illuminated manuscript.

This tradition came to India by 800 AD. Jain, Hindu, and Buddhist traditions of illuminated manuscripts exist in various parts of India. However it became the dominant style of creating manuscripts during the Mughal period. Akbar the great was by far the biggest patron of illuminated manuscripts in India. He had studied painting himself in his youth and had inherited his father’s library. After he moved his capital to Fatehpur Sikri he set up a school dedicated to miniature painting under the tutelage of Persian master artists.

This style soon spread to the surrounding Hindu courts and the Hindu epics of the Ramayana, Mahabharata, smaller fables and fairy tales began to find themselves in this format in all languages and scripts.

The people of the Indian subcontinent have historically been a culture of knowledge. Thousands of texts and illuminated manuscripts have survived to this day. It is proof that whether in the midst of war or prosperity, kings and scholars worked to preserve the culture and histories of their people. So the next time you write a note, imagine who might find it years from now.

PROJECT

  • There are scores of scripts that originated in the Indian subcontinent. Can you find out which ones are still used today? Hint: You might find more than one language that uses the same script.
  • Learn how to write your name in 3 different scripts you don’t already know.
  • Write a report about what you read in the style of an illuminated manuscript. Have a small picture in one corner and place your text around it.

Balloon on Fire

REQUIREMENTS

  • 2 Balloons
  • Water
  • Candle
  • Kitchen Lighter

WHAT TO DO

Fill one of the balloons with air and the other with a little water. Light the candle with the kitchen lighter.

WHAT HAPPENS

When you bring the balloon with only air close to the candle, it bursts immediately after it making contact with the flare. Sometimes it explodes even before it makes contact. The second balloon with the water in it, when brought close to the candle doesn’t explode, even though the balloon is kept directly under the flare for some amount of time.

WHY THIS HAPPENS

This happens because water is a great conductor of heat and does not allow the balloon to overheat.

TRY THIS

Fill as much water as you can in the balloon and bring it near the candle. What happens?

For more such science experiments and articles, visit: Science for Kids.

Where Do We Get Oil From?

  • The Earth’s surface, millions of years ago, was covered with more water than what it has today and living in this were billions of tiny plants and animals.
  • When these plants and animals died, they fell to the ocean floor and piled up sand from eroding rocks and mud covered them up.
  • These layers of sand and mud were heavy and this weight turned them into sedimentary rocks.
  • Heat from the earth and the weight of the rocks caused the dead plants and animals to compress into oil. Once the oil is formed, it slowly moves up through pores in the rocks. However in some cases, rocks without any pores leaves oil trapped underground.
  • Oil is found in different parts of the world. The places where oil is extracted are called oil fields. More than half of the world’s oil is produced in the Middle East. To get to the oil, a company must first drill down to it. A rig is set up to support the drill. Then a well is drilled into the ground until the oil is reached. If the oilfield is in the sea, then offshore rigs are used.

For more such Geography articles and videos, visit: https://mocomi.com/learn/geography/

The East India Company

With the arrival of the Portuguese explorer, Vasco da Gama in 1498 at Calicut in South India, European explorers started arriving on Indian shores. Their prime purpose was the profitable spice trade.

At the end of 1600, Queen Elizabeth of England allowed a large body of merchants to form a new trading company to trade with the East Indies, India and Southeast Asia, which later came to be known as the East India Company. In 1617, Sir Thomas Roe approached the Mughal Emperor, Jahangir and sought his permission to build a factory in Surat. In two years, this permission was granted.

Within ten years, another factory opened in Bombay, which became the headquarters of the company. Soon the Indian region was divided into three Presidencies; Calcutta, Bombay and Madras. Each presidency functioned by itself, but was answerable to the Court of Directors in London.

The company cleverly followed a triangular trade. They exchanged English gold and silver coins for Indian goods. They then utilized these in China to subsidize the prices of commodities they bought there. With this system the Company earned huge profits and became richer.

The Company however was corrupt and drained their profits. This increased the need to collect higher revenues. Peasant landowners were forced to pay their taxes in cash. They in turn approached moneylenders, who seized their lands on their failure to repay the loans. There was widespread discontent and anger.

In 1757, a military force led by Robert Clive defeated the army of the Nawab of Bengal, Siraj-ud-daulah. With this victory, The Company was transformed from an association of traders into rulers of a large, unknown land. From this moment the British Raj was born.

By 1765, the Company had taken over Bengal. They also exercised the right to collect revenues on behalf of the Mughal Emperor in Bihar and Orissa. Warren Hastings, the Governor General of Bengal, consolidated the military victories and established the fact that they were not answerable to the Mughals.

The British justified their rule by claims that there was a need for Indians to be ‘civilized.’ They sought to replace Indian systems with a more reliable method of justice, law and fair play. There were some religious practices that the British banned, like ‘Sati.’

Over the next few decades, under the governor-generals, Dalhousie and Cannin, the British took over even more territories. Their excuse was that the rulers of these territories were corrupt or incapable or that they had no descendents. Smaller Kingdoms like Sambalpur, Baghat, Jhansi, Nagpur and Awadh fell into this trap.

The British could not take over Punjab, as the Sikhs were a dominant force under King Ranjit Singh. Punjab was safe from British invasion after his death. After that the British forces started moving in, bringing an end to the Sikh Empire. In 1839, the British seized Sindh, Karachi, Sukkur and Bukkur (all in present-day Pakistan).

For more such interesting history articles and videos, go to this page.

Rani Laxmi Bai

Indian Freedom Fighter

Rani Laxmi Bai, the Rani of Jhansi (November 1835 – 17 June 1858) was the queen of the Maratha-ruled princely state of Jhansi, situated in the northern part of India. She was one of the leading figures of the Indian Rebellion of 1857 and a symbol of resistance to the rule of the British East India Company in the subcontinent.

Her father worked at the Peshwa court of Bithoor and because of his influence at court Laxmi bai had more independence than most women, who were normally restricted to the zenana. She studied self-defence, horsemanship, archery, and even formed her own army out of her female friends at court.

Rani Laxmi Bai was married to Raja Gangadhar Rao Newalkar at the early age of 7 to the Maharaja of Jhansi in 1842, and thus became the queen of Jhansi. After their marriage, she was given the name Laxmi Bai. The Raja was very affectionate towards her.

Jhansi Ki Rani

She gave birth to a son, Damodar Rao, in 1851. However, the child died when he was about four months old. After his death, the Raja and Rani of Jhansi adopted Anand Rao. Anand Rao was the son of Gangadhar Rao’s cousin, and was later renamed Damodar Rao. It is said that the Gangadhar never recovered from his son’s death, and died on 21 November 1853. When the Maharaja died, Rani Laxmi Bai was just eighteen years old, but never lost her courage and took up the responsibility of protecting the interests of Jhansi.

Lord Dalhousie, the Governor-General of India at that time, tried to take advantage of the misfortune of Jhansi to expand the British Empire. The British did not accept Damodar Rao, as the legal heir of Rani Laxmi Bai and her late husband. In March 1854 Rani of Jhansi was granted an annual pension of 60,000 and was ordered to leave the Jhansi fort. She was firm on the decision not to give up the dominion of Jhansi to the British.

For strengthening the defense of Jhansi Rani Laxmi bai assembled an army of rebellions, which also included women. For this great cause she was supported by brave warriors like Gulam Gaus Khan, Dost Khan, Khuda Baksh, Sunder-Mundar, Kashi Bai, Lala Bhau Bakshi, Moti Bai, Deewan Raghunath Singh and Deewan Jawahar Singh. She assembled 14,000 rebels and organized an army for the defence of the city.

Rani Laxmi Bai and Indian Rebellion of 1857

On May 10, 1857 the Indian Rebellion started in Meerut. This began after the rumour that the new bullet casings for the Enfield rifles were coated with pork and beef fat and unrest began to spread throughout India. During this chaotic time, the British were forced to focus their attentions elsewhere, and Rani Laxmi Bai was essentially left to rule Jhansi alone, leading her troops swiftly and efficiently to quell skirmishes initiated by local princes.

Rani Laxmi Bai had always been hesitant about rebelling against the British. Her hesitation eventually came to an end when British troops arrived under Sir Hugh Rose and laid siege to Jhansi on 23 March 1858. An army of 20,000, headed by Tatya Tope, was sent to relieve Jhansi but failed to do so when his forces engaged with the British on 31 March. Three days later the besiegers were able to breach the walls and capture the city. The Rani escaped by night with her son, surrounded by her guards, many of them women.

Death

Along with the young Damodar Rao, Rani Laxmi Bai decamped to Kalpi along with her troops, where she joined other rebel forces, including those of Tatya Tope. The two moved on to Gwalior, where the combined rebel forces defeated the army of the Maharaja of Gwalior and later occupied a strategic fort at Gwalior. However, on 17 June 1858, while battling in full warrior regalia against the 8th (King’s Royal Irish) Hussars in Kotah-ki Serai near the Phool Bagh area of Gwalior, she was killed at battle. The British captured Gwalior three days later. In the British report of the battle, General Sir Hugh Rose commented that the Rani, “remarkable for her beauty, cleverness and perseverance”, had been “the most dangerous of all the rebel leaders.”

Her father, Moropant Tambey, was captured and hanged a few days after the fall of Jhansi. Her adopted son, Damodar Rao, fled with his mother’s aides. Rao was later given a pension by the British Raj and cared for, although he never received his inheritance. Damodar Rao settled down in the city of Indore, and spent most of his life trying to convince the British to restore some of his rights. He and his descendants took on the last name Jhansiwale. He died on 28 May 1906, at the age of 58 years.

Shivaji Maharaj

STORY OF SHIVAJI BHOSLE

Shivaji Raje Bhosle was born on 19 February 1630, at the hill fort of Shivneri, near Junnar in the Pune district. He belonged to the Bhosle clan who founded the Maratha empire.

Swaraj Empire

Shivaji’s father Shahaji served alongside Malik Ambar, who defended the Deccan region, the first to be done by any Maratha against the Mughals. He always tried to free their kingdom from The Sultanate Of Bijapur as well as wanted to throw out the Mughal rule in India and establish a Swaraj Empire.

Rajmata Jijabai

His mother Jijabai was a pious and far sighted lady. She is regarded to be the master of Shivaji’s bravery. Shivaji was extremely devoted to his mother who was also very deeply religious. This religious environment had a great influence on Shivaji, and he carefully studied the two great Hindu epics, Ramayana and Mahabharata. The morality and spiritual messages of these epics left a great impression on him.

Torna Fort

By the age of 16, Shivaji managed to gather a band of fiercely loyal Maratha men and set about conquering nearby lands. Their first triumph was the capture of Torna Fort of the Bijapur Kingdom. By 1647 he had captured Kondana and Rajgad forts and had control of much of the southern Pune region.

Battle of Pratapgarh

In a bid to contain Shivaji, Adil Shah sent Afzal Khan, an experienced veteran general along with an army of 40,000 men to destroy Shivaji. Upon weighing his options carefully as to what action must be taken, Shivaji decided to meet Afzal Khan on his home turf at the base of the Pratapgarh fort insisting that the meeting be an informal one. He sent a letter to Afzal Khan stating that he was eager for it. Afzal agreed.

At the meeting, Afzal Khan stabbed Shivaji in the back when the two embraced each other. Shivaji was well prepared for this and survived the attack, protected by a chain mail armour he was wearing and counter-attacked by slaying Afzal Khan with the wagh nakh (tiger-claws glove). Afzal’s army who were prepared to attack had no idea that their leader had been slain when Shivaji walked out with the decapacitated head of Afzal Khan on his sword. On seeing this the the army surrendered.

Shivaji and Aurangzeb

The Mughal emperor Aurangzeb now identified Shivaji as a major threat to his mighty Mughal Empire. He sent his uncle Shaista Khan with a large army to defeat Shivaji. Shivaji lost a large number of forts and areas to Aurangazeb and was driven out of Pune. But he did not stay defeated for long and soon overthrew Khan and re-established his rule. In a few years he recovered most of his forts.

Shivaji fought a number of battles thereafter, a vast number of them against Aurangazeb. He was even captured on one occasion but managed to plot an ingenious escape plan a few day prior to his execution. He fought a life long battle against foreigners on Indian land and never bowed down to any of them. He built a number of forts in his time and even acquired a large number along the way.

Raigad Fort

Shivaji’s center of power and growth became the fort of Raigad in the Raigad district of Maharashtra. This place became Shivaji’s capital city. Perched on top of a hill that was split off from the Western Ghats, the fort was virtually inaccessible from three sides. It is said that prizes were given to those who tried innovative methods to reach the top.

Under his rule ‘untouchables’ were given true justice. They were also recruited in the army as well as promoted. Shivaji also laid great importance on Sanskrit. He ensured that Sanskrit was never lost. He replaced Persian words with Sanskrit ones where possible. He brought true justice to those who were wronged. The people of his land loved him and truly worshipped him.

Religion too was given importance. He allowed his people to follow their religion of choice. He also allowed people to convert back to being a Hindu after having converted to Islam under Aurangazeb. He ensured that respect was given to mosques- Muslim places of worship and also to Muslim women. As a result, a large number of Muslims served in his army.

Because of these qualities, Shivaji was able to instill the same passion for revolution against the Mughals in the minds of his people. He inspired his people so much that the Maratha Empire continued to fight the Mughal rule for 27 years after his death. Shivaji breathed his last in 1680, but is fondly remembered for his acts of bravery and kindness towards his people even today. His birthday is celebrated with grand fervour in Maharashtra, amongst Maharashtrians even today.

Tipu Sultan

The Story of Tipu Sultan –

Tipu Sultan was born at Devanahalli, 33 km north of Bangalore. He is said to have been born on 20 November 1750. His father, Hyder Ali, was a military officer in service to the Kingdom of Mysore who quickly rose in the ranks and became the de facto ruler of Mysore in 1761. His mother Fatima or Fakhr-un-nissa was the daughter of the governor of the fort of Kadapa.

Tipu Sultan was introduced to military training by French officers in the employment of his father. By the time he was 15, Tipu accompanied his father against the British in the First Mysore War in 1766. In a year’s time he was made commander to a cavalry he led during the British invasion of South India. By the end of the war Tipu Sultan had already made a name for himself.

In 1779, the British captured the French-controlled port of Mahe, which Tipu had placed under his protection, providing some troops for its defence, which resulted in the start of the second Anglo-Mysore War. In response, Tipu’s father dispatched 10,000 men and 18 guns. In this battle, Tipu decisively defeated Baillie as well as Colonel Braithwaite. He brought down armies of nearly 7000 men.

By the time his father died, Tipu Sultan had gained sufficient military experience and on 22 December, he became the ruler of Mysore. He then started working on checking on advances of the British by making a alliance with the French, Afghanistan as well as the Sultan of Turkey.

In 1789, Tipu triggered off the Third Anglo-Mysore war by attacking the British Colony of Travancore. The war lasted three years and brought an end to Tipu as he had to give up half of his kingdom, and had to pay a fine of 33 million rupees and also had to deal with the kidnapping of his two sons.

Tipu Sultan paid the fine and got back his sons. He then slowly started building his army, preparing for war. Apart from that Tipu also wrote the books ‘Futuh-ul-Majahdin and ‘Farmeh Ba Nam Ali Raja.’ He built roads and dams and even introduced new industries and promoted trade and commerce.

In 1799, Tipu was about to fight his most decisive battle. General Richard Wellesley was on a mission to bring down Tipu, and in two months his armies marched towards Srirangapatnam, and thus began the fourth Anglo-Mysore War.

Tipu was caught unprepared for battle but fought fiercely like a ‘Tiger’ a nickname he had received for the battles he had fought with the British. The British however were too powerful and were able to surround the palace.

When all hope was lost, Tipu raced back to the palace to kill all the women, for he knew that they would rather die than be at he mercy of the British. Unfortunately, he was shot at the entrance and died.

Tipu Sultan was buried at a mausoleum that he had built himself. He was considered as one of the most powerful Princes of India and was said to be the biggest threat to the British position in Southern India.

For more such interesting history articles and videos, visit History for Kids category.

Invisible Glass Trick

REQUIREMENTS

  • Container (pyrex)
  • Beaker (pyrex)
  • Vegetable oil

WHAT TO DO

Pour vegetable oil into the larger container and then immerse the smaller container in the larger container.

WHAT HAPPENS

The beaker looks like a ghost like object in the container, almost invisible.

WHY THIS HAPPENS

The real secret behind this science experiment is the index of refraction. When light travels through the glass, and then through the oil, the speed of light slows down and then it hits the glass and refracts or reflects and this is why the glass looks invisible.

TRY THIS

Do this experiment with glasses of different shapes and sizes to see what kind of an effect it has on them. You will find that not all glasses have the ability to vanish.

For more such science experiments and articles, visit https://mocomi.com/learn/science/

The Advantages of the Wheel

REQUIREMENTS

  • A book
  • Straws
  • A table

WHAT TO DO

Push the book on the table with your hands. Bring the book back to position and place a few straws in its way and then push the book over it.

WHAT HAPPENS

When you push the books with your hands, you find that some amount of force needs to be exerted in order for the books to move. This is not the case when the books move over the straws and the effort required is a lot lesser.

WHY THIS HAPPENS

Since the surface of the table is not smooth enough, it causes friction, and therefore the force needed to move the book is much more. When the book moves over the wheels, the surface is smoothened, and the friction is much lesser. This is why the book moves better on wheels made of straw!

TRY THIS

Attempt to do this experiment in the playground where the surface is uneven. Do the straws still assist in moving the book with greater ease?

For more such science experiments and articles, visit https://mocomi.com/learn/science/

How is the weight of a ship measured?

To measure the weight of a ship, we will use the Archimedes’ Principle. Archimedes’ Principle states that “Any floating object displaces its own weight in fluid.”

Let’s say that we have to measure the weight of the ship below. We will need water dock, cubic meters. Note down the current water level. Put the ship into the dock. Now note the level. Here the water level has increased by 5 cubic meters.

So by Archimedes’ Principle

  • Weight of the ship = 5m3 x Density of water
  • Weight of the ship = 5m3 x 995.65 kg/m3
  • Weight of the ship = 4978.25 kg

This is how we calculate the weight of a ship.

For more such interesting Physics videos and articles visit our Physics for Kids category.

What are Bumps and Bruises?

Have you ever crashed into another person when running around on the playground and so got a nasty bump? And if it’s really bad then the swelling is accompanied with hues of purple, green, and yellow surrounding the injured area. Let’s find out why all this happens.

Right under the top layer of your skin is a network of very fine tubes that carry blood known as capillaries. When you bump into something these capillaries burst and release the blood that is flowing through them into the surrounding tissue. Even though the skin does not break, blood is released into the tissue and will coagulate. Bumps normally occur when the injury is near a part of the body that is close to the bone, like on your head, shin, or forearm.

Bruising occurs due to the same reason as bumps but the different colours appear because of the blood that spills out of the capillaries into the tissue. As haemoglobin breaks down it changes colour from purple to green, then yellow and finally golden brown. Since this is not actually life-threatening, the body will automatically clean up the bruised area and your skin will be looking as good as new in a week or so.

Can you find out why you get a black eye when you break your nose?

Looking for more biology articles and videos? Go to: Biology for Kids.

Persian And Greek Invaders

Persian And Greek Invaders –

In the year 520 BC, two kings from Persia, Darius and Cyrus invaded Northwest India and conquered the Indus Valley. The Persians ruled that part of India for about a century and a half.

Aryan Kingdoms in the meantime continued to flourish in the East.

The Greek army, headed by Alexander the Great, invaded parts of Northwestern India. As Alexander’s army conquered lands along their way, he got engaged in an epic battle with the local ruler of Punjab, Raja Puru or King Porus. Alexander emerged victorious and was so impressed with Puru’s bravery that he made an alliance with him and appointed him General of the land.

Although Alexander’s army won, they refused to go any further than present-day Jalandhar. Rumour had it that a mighty Indian army was waiting on the other side to fight them. The Indus river, marks the end of his conquered lands. Alexander left India soon after naming some of his generals as governors or satraps of the conquered provinces. But in a few years, Indian forces chased away most of the generals.

Persian and Greek invasions had a great impact on the political systems of India. The region of Gandhara (today’s Afghanistan and Northwestern Pakistan) became a mix of cultures- Indian, Persian, Central Asian and Greek. This gave rise to a new culture called Greco-Buddhism which lasted till the 5th century.

For more such interesting history articles and videos, visit History for Kids category.

How does the Nervous System Work?

What is Nervous System?

The nervous system controls the functions of every part of the body. It also tells the body how to respond when it comes in contact with some stimulus.

So, how does the nervous system work?

The nervous system is made up of:

Central Nervous System:

  • Brain and Spinal Cord

Peripheral Nervous System:

  • Nerves

The peripheral nervous system is controlled by the central nervous system and connected to every muscle in our body. The entire nervous system is made up of billions of pyramidical cells called neurons. Short thread-like branches called dendrites connect the neurons to each other.

Neurons send messages throughout the body in the form of short bursts of electricity. The brain and spinal cord receive impulses from different organs and senses and tell them how to react.

Interesting Fact about the Nervous System:

Impulses travel at the speed of several hundred miles per hour. So, an impulse can go from your head to foot in just a very small fraction of a second.

Looking for more biology articles and videos? Go to: Biology for Kids.

What is the difference between Fog and Mist?

What is fog?

Have you ever walked out of your front door in early morning and faced a thick covering of white air that prevented you from seeing more than a few feet in front of you? This is known as a fog. It is actually a type of stratus cloud but is called by a different name because it forms by a different process.

How is fog formed?

A stratus cloud is any low-lying cloud that makes the atmosphere hazy. Like all clouds, they are formed when water vapour condenses when it rises to a cooler part of the earth’s atmosphere. However, a fog is different because the water vapour reaches its dew point (the temperature at which it turns back into water droplets) right over the surface of the earth. We cannot see water vapour because it is a gas, but when it turns back into water droplets, it becomes visible to the eye.
This rapid cooling just over the ground could be caused by a number of reasons.

What causes fog?

Falling rain can cool down the water vapour and cause it to remain suspended close to the ground as a fog.
When there is a big difference between the temperatures of the day and night, the land continues to lose the heat it absorbed during the day. The cool night air sandwiches the water vapour close to the ground resulting in a fog.
Finally, when warm, moist air blows over a cold surface like ice or snow, it cools it down rapidly and turns to fog.

Fog vs Mist – Comparison

You may wonder then- what is the difference between fog and mist? Well they are actually one and the same. A mist is simply a fog that isn’t very thick. The exact definition is if you cannot see an object that is less than 1 km in a mist, it is considered a fog.

How to make fog with dry ice?

You can create fake fog. You will have to do this with an adult. Buy some dry ice and put it into a steel container. Go into a relatively small room and pour some water into the container. You will see that this begins to produce a thick wispy layer of smoke. Can you explain why this is happening?
(Note this task involves chemicals and the by-product should not be inhaled)

Tagline: Low-lying water droplets

Get to know 10 interesting facts about the Air Pollution in Delhi.

Structure of the Earth

Earth Structure and Composition

The Earth’s structure consists of three parts, the crust, mantle and core. The crust is on the outside, while the mantle is in the middle and the core is the innermost section. The core is divided into two parts, the inner core and the outer core.

The structure of the Earth is similar to that of an egg. The Earth’s crust is like the shell of an egg, its mantle is like egg white and the core is like yolk.

What is Earth made of?

The Crust

The crust is found beneath mountain ranges and can be as thick as 40 kilometres. However, the Earth’s crust under oceans is only about 8 kilometres thick.

The Mantle

Parts of the Earth’s mantle are made up of hot rock, so they melted. This molten rock seeps through cracks in the crust and pours out of volcanoes. This is called lava. When the lava cools down, it turns into stone.

The Core

Scientists believe that the Earth’s core is mostly made up of iron. They feel that the inner core is solid while the outer core is in a liquid state.

How are Mountains Formed?

The crust and the rocky upper layer of the mantle are together called the lithosphere. The lithosphere consists of huge plates that move very slowly. These plates may collide, pull apart or even grind against each other. When these plates collide, one slips beneath the other and this pushes up mountains and forms trenches in oceans.

Interesting Facts about Earth

Scientists understand the composition of the Earth’s interior better by studying seismic waves. Seismic waves are vibrations that spread out from the epicentre of earthquakes. Their strength is measured and recorded when they reach the Earth’s surface. These waves have also revealed that the lithosphere, (which consists of plates that move as a result of convection currents in the mantle) is about 100 kilometres thick. The mantle is 2,900 kilometres thick. The core’s temperature ranges from 4,000 to 6,000 degrees Celsius, according to estimates.

Things To Do

  • What kind of rocks are found in the mantle?
  • The oceanic crust is made up of two primary metals. Name them.
  • Apart from using seismic waves to identify the structure of the Earth, what other techniques are used to do the same?

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

Where Do We Get Coal From?

  • Millions of years ago, a large number of plants and ferns grew on Earth.
  • These plants and ferns died in swamps, around riverbanks and got covered with soil and mud and slowly sank into the ground.
  • As the years passed, the Earth’s heat and the weight of the ground changed these dead plants into coal.
  • To extract coal, it needs to be dug out. Coal is usually found in layers, or seams underground.

ADDITIONAL INFORMATION

Like fossil fuels like natural gas and oil, coal is formed by the transformation of organic matter. Plants that lived in vast swamps 300 million years ago are the source of most of the coal that is mined today. As those plants died, they sank into the swamps and were covered with sediments. Gradually, they decomposed into peat. As the peat sank, ground heat and pressure removed hydrogen, oxygen and nitrogen from it to leave mostly carbon. This is what we know as coal. Coal is classified by its carbon content- the greater the carbon content, the more heat it gives off when burnt. The lowest grade of coal is lignite, followed by sub-bituminous coal, bituminous coal and anthracite, which is 98 percent carbon.

THINGS TO DO

  • Use coal to draw. Break a piece of coal to use like a pen for drawing.
  • Try burning different types of coal and see which one burns the quickest and slowest.

For more interesting Geography articles and videos, visit: https://mocomi.com/learn/geography/

What is the Ozone layer?

Have you ever wondered why cricketers paint their faces white? Or why your mother insisted that you put on sun screen lotion before stepping out every summer? The answer is UV rays.

Though the sun plays a vital role in our lives by providing light and energy, there are some sunrays that can be harmful.These sunrays can increase the risk of skin cancer, cataract and harm the immune system. They can also damage terrestrial plant life, single cell organisms, and aquatic ecosystems. These harmful sunrays are called Ultra Violet (UV) rays.

Life on earth is protected from the UV rays by a layer in the upper atmosphere knows as the stratosphere which surrounds earth. This layer is called the Ozone layer.

Ozone is a gas made up of three oxygen atoms(O3)much like the layer of butter that settles on top if a glass of buttermilk is left unattended for a while. This layer is just about 3-5mm thick. This thinly spread-out gas has been protecting life near the earth’s surface from the sun’s harmful UV rays for billions of years. Ozone is spread thinly throughout the stratosphere in low quantities.

Why is the Ozone Layer in danger?

Our ozone shield is now being deteriorated due to certain man-made chemicals,primarily chlorofluorocarbons(CFCs) and nitrogen oxides. CFCs are a group of chemically similar gases used in refrigeration systems, air conditioners, aerosols, solvents and in the production of some types of packaging.Nitrogen oxides are a by-product of fuel burning,for example:aircraft exhausts.

What is the Ozone hole?

The ozone hole is not literally a ‘hole’ but an area wherein the total ozone amount is less than 220 Dobson Units. This depletion of the ozone layer occurs during spring time in the Southern Hemisphere between the months of August and October.

Though the ozone layer globally is in danger, the layer above Antarctic is in greater danger as it is fast depleting. It takes only a small amount of CFCs to destroy an awful lot of ozone.

The ozone hole has steadily grown in size up to 27 million sq. km

Can we stop the depletion of Ozone Layer?

Yes we can! All we have to do is to reduce the production of those chemicals that cause the destruction of ozone, like CFCs and nitrogen oxides. In 1987, the Montreal Protocol was signed by many nations whereby those nations that signed agreed to reduce their emissions of CFCs to a half by 2000. Worldwide standards for air-conditioning equipments are being modified and a new substance called HFC (hydro fluorocarbons) is being used instead of CFC. So, encourage your parents, relatives and friends to make sure their refrigerators and air conditioners do not have CFCs.

Find out the name of the scientists who discovered a recurring springtime Antarctic ozone hole. Find out about ozone gas that can be dangerous to our health.

 For more environment related articles and videos, visit: Environment for Kids category.

How does the Circulatory System work?

The circulatory system is responsible for transporting substances between different parts of the body.

So, how does the circulatory system work?

The Circulatory System has two parts:

1. Heart

The heart is the center of the circulatory system. It keeps pumping blood throughout the body. It sends pure, oxygen-rich blood to all the parts of the body and receives impure blood from them. This impure blood, which contains carbon dioxide, is then sent to the lungs for purification.

2. Blood Vessels

The blood vessels act as pipes that take blood to every cell in the body.
There are 2 types of blood vessels:

  • Arteries carry pure blood from the heart to all the parts of the body.
  • Veins take impure blood from the parts of the body to the heart.

Blood is made up of Red Blood Cells (RBC), White Blood Cells (WBC) and plasma. The RBC carry the oxygen in the blood. The WBC are responsible for fighting the germs that enter our body.

The plasma is the liquid part of the blood and makes up almost 50% of the blood. The food nutrients and other substances needed by all the parts of the body are dissolved and transported by the plasma. Similarly, all the waste substances to be thrown out from the lungs and kidneys are also dissolved in the plasma and transported.

Read more about What is Blood and Types of Blood, visit: https://mocomi.com/blood-types/

Doppler Effect

What is the Doppler Effect?

When fire sirens or police cars are rushing somewhere you can hear them approach. They do not have to follow normal traffic rules and can run past traffic signals. Since they must reach the scene without any delay, they use their sirens to tell people to move out of the way. Sirens on vehicles are normally two long notes that continuous move from one frequency to the next. Have you noticed that these two notes seem farther apart when the source is far away and faster when the source is next to you?

This is because sound travels in waves. When the source is stationary the waves will reach you at the intervals in which they are produced. Imagine an insect sitting in the middle of a pond. The waves created from the disturbance of the insect will reach the shore uniformly. Now imagine that the insect is moving left while creating the same disturbance. Now since the bug is moving, each disturbance is being created from a different location.

The effect of the sound getting quicker and louder as the source approaches you is known as the Doppler effect. It is not caused because the beat is changing or the volume getting louder. The frequency of the waves reaching you get higher as the source approaches, it is equal at the instant it is right next to you, and lower after it passes.

People are so in tune with the sirens of police cars and fire trucks that they know when to slow down or move out of the way when one approaches. Even though they have their siren to warn people, these rescuers still slow down at junctions and stop if necessary, even though they have the right of way.

THINGS TO DO
Find a long space. It could be indoors or outside in your colony. Ask a friend to make the sound of a siren and run towards you. Do you notice the Doppler effect? Now do the same for your friend.

For more such interesting Physics videos and articles visit our Physics for Kids category.

How does the Digestive System Work?

The digestive system is responsible for supplying the body with the nutrients needed for carrying out bodily functions. It breaks down the food we eat into smaller particles, which is then used by the body to generate energy.

What organs make up the digestive system?:

  • Mouth, Oesophagus, Stomach, Small Intestine, Large Intestine, Rectum

Mouth :–

Food is broken into smaller pieces in the mouth by chewing.

Oesophagus :–

These pieces, being easy to swallow and digest, travel down the oesophagus to the stomach.

Stomach :–

The stomach contains juices which break down these particles into smaller molecules.

Small Intestine :–

The food is further broken down in the small intestine. Glands like the liver and pancreas produce bile and pancreatic juice, which help in the process. The simple molecules are then absorbed into the blood stream from the small intestine and sent to all the parts of the body.

Large Intestine :–

Water is absorbed from the remaining food in the large intestine.

Rectum :–

The leftover solid waste is thrown out of the body through the rectum.

What are the end products of digestion?

Proteins ——-> Amino Acids
Fats————–> Fatty Acids
Starch———–> Simple Sugars

The small intestine is over 20 feet long. Food can travel for over 12 hours in our digestive system before it gets completely digested.

Click here how-does-the-circulatory-system-work/

Why do we get Tanned?

The sun is a life-giving force. Trees use light from the sun as a power source to process food and it heats up the earth so that it doesn’t get too cold to live. However too much sun can also be harmful to humans and plants alike.

What is a suntan?

The brown colour in your skin is caused by the presence of a pigment called melanin. It serves as a protective layer in your skin to prevent it from getting damaged by the sun. When our skin is exposed to the sun it begins to produce melanin to protect itself. Over a long period of time, the accumulation of this pigment under your skin is known as a tan. The body does not produce melanin immediately.

What causes skin to burn?

If your skin is exposed to very harsh sunlight, your body may not be able to produce enough melanin in time to prevent your top layer of skin from getting severely damaged. This is why we get sunburned. The layer of skin that gets burned will automatically peel off to reveal a new layer of skin underneath.

But it is not healthy to allow this to happen. So if you know you’re going to go out in the sun, put on suncreen if you’re at the beach; or cover up with some cool cotton clothing.

Most sunscreens has different SPFs. Can you find out what that stands for and what it means?

Why do Crabs walk Sideways?

It is easy for us humans to move backwards, forward and sideways, this is because of how our legs are attached to our bodies. The bending of the knee towards the front also makes walking forward easier. A crab’s legs, however, are attached to the side of its body. Its joints unlike our knees bend outwards, thus enabling the crab to only move sideways.

Do all Crabs walk sideways?

There are a few crab species that can walk forward. These crabs have shells that are longer and wider. Crabs that walk sideways have shells that are wider than they are long.

Are Crabs the only animals that walk sideways?

Other animals move sideways too. The rattlesnake, for example, moves sideways as it makes its way in the desert.

Additional Information

Crabs are crustaceans and have five legs on each side of its hard shell. The front pair of legs is used for grasping food, for example and defence. The other four pairs are used for walking or swimming. Each leg has seven joints that are arranged so that the crab can walk sideways.

Project

  • Find 5 other animals which walk sideways.
  • When you go to the beach, look around for crab nests. You will find several baby crabs moving in and out of their nests. Notice how they walk.

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What is Panting?

Our lungs are responsible for providing the body with oxygen that is essential for our body to work. When you breathe in, your lungs fill with air and tiny structures inside, called bronchioles, absorb the oxygen from this air. Immediately, the oxygen is absorbed into the bloodstream and taken to the heart, where it is pumped to the rest of the body.

Why do we pant after running?

When we breathe normally, this process of breathing allows our body to absorb oxygen from the air we breathe and release the used up air. However when we run around or are very active, the muscles in our body require more sugar to produce the added energy. Our muscles need an extra amount of oxygen in order to use the sugar in the blood for energy. This is why we pant or breathe more heavily when we are running around or playing a game.

Should we eat before working out?

We do not have to purposely breathe faster when we run. Our body will automatically adjust our breathing to make up for the energy we require. Since oxygen-rich blood is needed by the lungs and muscles to do exercise, it is advised that you do not eat before doing any heavy activity, as oxygen-rich blood is also needed by the stomach to digest food once you’ve eaten.

Project –

Record the amount of breaths you take in one minute. Then run a set distance and compare how many breaths you take per minute. Once your breathing comes back to normal, run the same distance but this time try and purposely take longer breaths as you run. What is the difference in your breaths per minute after round 1 and round 2?

What are Clouds Made of?

One of the most common sights in nature are clouds- white and fluffy, gray and overcast, or the brilliant colours they turn into at sunset. In terms of weather they are simply visible masses of tiny water droplets and a whole branch of study called cloud physics is dedicated to understanding this cotton candy-looking phenomenon.

But, what are clouds made of?

When the sun shines over rivers, lakes and oceans of the world it heats up the surface of the water. The water turns into gaseous water vapour on being heated and begins to rise into the air. As it goes higher, the water vapour begins to cool down and turns back into water droplets. The temperature at which water condenses is called the dew point. The dew point is not a constant because it depends on the amount of water present in the air.

These water droplets in clouds are so tiny that they hang suspended high up in the earth’s atmosphere. Over a period of time condensed water vapour accumulates to form clouds. The water droplets higher up in the cloud are colder than the droplets below to the extent that some parts of a cloud can even contain small bits of ice. After a while the cloud becomes heavy with water droplets and gravity brings the water droplets back down as rain. So now you know how clouds are formed.

But why do clouds appear white?

Clouds appear white because they allow light to pass through it. Since sunlight is white, the water droplets simply act like a canvas upon which the sun throws its rays. When trillions of water droplets get together in one cloud, they allow less and less light to pass through it thus giving it a dark gray hue. This is also how we know that it is about to rain.

Water vapour is the same ingredient in the atmosphere that is responsible for making rainbows. Can you say why clouds are white and not rainbow coloured?

For more interesting Geography articles and videos, visit our Geography for Kids category.

National Symbols of India

1. Indian National Flag

The Indian national flag is also known as the Tiranga. It has 3 stripes:
Orange – representing courage
White – which represents purity
Green – it represents fertility.
It also has a navy-blue chakra in the middle of the white stripe.
This is the Dharma Chakra or the Wheel of Law.

2. Indian National Emblem

The government seal of India is taken from Ashoka’s Sarnath Lion pillar. Underneath it are the words Satyameva Jayate which means ‘truth alone triumphs.’ This is the government letterhead and will appear on all official documents.

3. Indian National Currency

The rupee symbol was adopted by the government in 2010 for official use on Indian bank notes and coins. It is a graphical representation of the Devanagari ‘ra’ and the English ‘r’ alphabets. It has 2 parallel lines at the top which looks like an ‘=’ sign.

4. Indian National Anthem

The Indian national anthem or Jana Gana Mana was written by Rabindranath Tagore. It is written in tatsama Bengali. It was adopted by the Constituent Assembly as the national anthem in 1950.
* tatsama = sanskrit form of Bengali

5. Indian National Song

Vande Mataram is the national song of India. It was written by Bankim Chandra Chattopadhyay. It is a hymn to the goddess Durga as if she were the land of India.

Lyrics :
vande mātaram
sujalāṃ suphalāṃ
malayajaśītalām
śasya śyāmalāṃ
mātaram
vande mātaram

Meaning :
I show gratitude to thee, Mother,
richly-watered, richly-fruited,
cool with the winds of the south,
dark with the crops of the harvests,
The Mother!
I show gratitude to thee, Mother.

6. Indian National Flower : Lotus

This sacred flower plays an important role in the different folklores of ancient India. The lotus holds a sacred place in the art of many cultures and religions of ancient India.

7. Indian National Fruit : Mango

India is very famous for over 100 different varieties of Mangoes. In the late 16th century Emperor Akbar planted 10 lakh mango trees in Lakhi Baug near modern day Bihar!

8. Indian National Tree : The Banyan tree

Ficus benghalensis is a variety of a fig tree. They are considered immortal and sacred since their roots descend from their branches to form entirely new trunks.

‘Treevia’
The Buddha is said to have attained nirvana whilst meditating under a banyan tree.

9. Indian National Animal : The Royal Bengal Tiger

The Panthera tigris has a thick coat of orange fur with deep black stripes. It is found throughout India and some surrounding countries.

Tiger Trivia
If you shave a tiger, you would still see a striped pattern since a tiger’s skin is also striped.

10. Indian National River : The Ganga

The Ganga or Ganges is the longest river in India and its banks are one of the most fertile and densely populated areas in the world.

11. Indian National Aquatic Animal : The River dolphin

Platanista gangetica is a fresh-water dolphin that represents the purity of the Ganga.

12. Indian National Bird : The Indian Peacock

The Pavo cristatusis, a swan-sized bird, has a beautiful fan of plumes which it can furl and unfurl in order to attract a mate.

13. Indian National Game : Field Hockey

Even though cricket might be more popular, field hockey is the national sport of India. India has a winning streak of 8 Olympic gold medals with 6 consecutive wins from 1928 – 1956.

14. Indian National Calendar

India uses a Saka calendar alongside the gregorian calendar. It is sometimes referred to as the Hindu calendar because the names of the months are marked from the traditional Hindu lunisolar calendars.

For more such interesting General Knowledge articles and videos, visit: GK for Kids.

How Does a Parachute Work?

How do Parachutes Work?

A parachute is a device used to slow down an object that is falling towards the ground.

There are two forces acting on the falling person:

  1. Gravity (Upwards)
  2. Air resistance (Downwards)

Without a parachute, the gravity is more than air resistance. However, as the parachute opens, the air resistance increases. Now, air resistance is more than gravity.

This slows down the parachute and the person can land safely on the ground.

For more such interesting Physics videos and articles visit our Physics for Kids category.

How does the Respiratory System Work?

What is Respiratory System?

The respiratory system supplies the body with oxygen needed to extract the energy from the food we eat. It gets this oxygen from the air we breathe. When we breathe this air out, we expel the waste carbon dioxide produced by the body.

How does the Respiratory System Work?

When we breathe in, air is inhaled through the nose and mouth. Air that passes through the nose gets warm and filtered. From the nose and mouth, the air goes through the windpipe and then to the lungs.

Towards the end, the windpipe branches into two pipes called bronchi, with one entering each lung. In the lungs, the bronchi branch into tiny tubes called bronchial tubes.

The air passes through these tubes and is absorbed into the billions of air sacs that make up the lungs. Each air sac is like a thin-walled balloon. Oxygen from the air easily passes into the blood vessels on the other side of these thin walls.

At the same time, waste carbon dioxide from the blood passes into the air sacs, from where it is exhaled out of the body with the remaining air.

Did you know?

If the lungs were completely opened up and spread out, they would cover an area equal to that of a tennis court.

Indian National Anthem

The Indian National Anthem was composed by the Nobel laureate Rabindranath Tagore. Watch this video to listen to and learn this song which sings of the various communities and geographies of India and the sentiments that bind them together.

In spite of all this diversity, Indians will always stand united in the face of adversities.

Indian National Anthem Lyrics

Jana gaṇa mana adhināyaka jaya he
Bhārata bhāgya vidhātā
Pañjāb Sindhu Gujarāṭa Marāṭhā
Drāviḍa Utkala Baṅga
Vindhya Himāchala Yamunā Gaṅgā
Uchhala jaladhi taraṅga
Tava śubha nāme jāge
Tava śubha āśhiṣa māge
Gāhe tava jaya gāthā
Jana gaṇa maṅgala dhāyaka jaya he
Bhārata bhāgya vidhāta
Jaya he, jaya he, jaya he
Jaya jaya jaya, jaya he.

Below is a detailed translation of the Indian National Anthem:

Jana-Gana-mana-adhinayaka, jaya he Bharata-bhagya-vidhata -> O lord of our destiny you are the captain of our souls and of the people of Bharat (India).

Punjaba-Sindhu-Gujarata-Maratha, Dravida-Utkala-Banga -> Your name rouses the hearts of Punjab, Sindhu, Gujarat, Maratha, of the Dravida and Orissa and Bangla.

Vindhya-Himachala-Yamuna-Ganga Uchchala-Jaladhi-taranga Tava shubhaname jage Tava shubha asisa mage. -> “Tava shubha name jage Tava shubha asisa mage” Your (the eternal charioteer of India) auspicious names echo in the hills of the Vindhyas and Himalyas, mingle in the music of Yamuna and Ganga and are chanted by the waves of the Indian Sea.

Gahe tava jaya gatha -> They pray for your blessing and sing your praise (unknowingly or knowingly they chant your names and are blessed.)

Jana-gana-mangala-dayaka jaya he Bharata-bhagya-vidhata -> “The saving of all people waits in your hand, Oh You dispenser of India’s destiny.”

Jaya he, jaya he, jaya he,Jaya jaya jaya, jaya he! -> Victory, victory, victory to You Victory Victory Victory to You (our God of destiny, because you are ruling us, and we are your servants. So you always win)

For more such interesting General Knowledge articles and videos, visit: GK for Kids.

What is the Periodic Table?

There are 118 chemical elements known to man. This is a large number and with all these elements combining to make different compounds, understanding them can be very confusing. Here to the rescue we have the Periodic Table, a tabular arrangement of all the known chemical elements according to their structural properties.

Each chemical is arranged in tabular form so that we can
1. Accurately predict the properties of various elements and study the relations between them.
2. Keep track of newly discovered elements.
3. Analyse chemical behaviour and two chemicals might react with each other.

What is Element?

An element is a pure chemical substance consisting of one type of atom. Examples would be carbon, oxygen, sodium and iron.

What is Atom?

An atom consists of a fixed number of protons, electrons and neutrons, which makes each element unique. Protons and neutrons together make up the nucleus of an atom while the electrons orbit around it.

In the periodic table, a chemical element is represented by a fixed format :

Atomic number = Total number of protons
Atomic symbol = One or two letters from the symbol’s name

The periodic table can be classified in three groups:
1. Metals
2. Metalloids
3. Non metals

Other ways to classify elements:
1. Alkali metals
2. Alkaline earth metals
3. Rare earth
4. Radioactive
5. Transition metals
6. Halogens
7. Inert gases

In this way, we can study the fundamental properties of elements and predict their chemical behaviour.

Learn about how the periodic table works, through this animated learning module, and by the end of it we’re quite certain that you will understand all your chemical elements much better!

Head on to Chemistry for Kids for more such interesting chemistry videos and interactive articles.

Atoms and Molecules

What is an Atom?

Matter can be described as any object that occupies space and has weight and mass. It is always found in one of three states- solid, liquid or gas, but no matter which state it is in, matter is made up of microscopic particles called atoms. An atom is a particle that is the most basic unit of matter. Any substance, whether solid, liquid or gas, is made up of millions of these tiny particles.

The origin of the word ‘Atom’

The word atom comes from the Greek word ‘atomos’ meaning indivisible.

The theory that matter is made up of these tiny particles was put forth by ancient Indian and Greek scientists. However, this theory could not be proven, because of the lack of technology. These miniscule particles are so tiny that they can only be observed with a very powerful instrument called a ‘scanning tunneling microscope.’ With its help scientists were able observe and record the nature of this tiny particle.

Structure of the Atom

The structure of an atom very closely resembles that of an egg. It has a nucleus in the middle, like the yolk of an egg. This part is made up of positively charged protons and neutrally charged neutrons. Around the nucleus are negatively charged electrons like the white of an egg, which rotate around the nucleus in fixed orbits.

What is an Atomic Number?

The number of protons in an atom is known as the atomic number. Therefore if an atom has the atomic number 8, it means that there are 8 protons in the nucleus and that the atom is of the element Oxygen. You can also safely say that all oxygen atoms will have 8 protons.

What is a Molecule?

When two or more atoms combine they give rise to a molecule. A molecule can be made up of many atoms of the same element, as in the case of 2 oxygen atoms combining to form O2, or a combination of atoms of different elements; where 2 hydrogen atoms combine with one oxygen atom to form H2O (water). There are 112 elements known to man, so can you imagine the different permutations and combinations of molecules that can exist freely in nature or be synthesized in a laboratory?

Head on to Chemistry for Kids for more such interesting chemistry videos and interactive articles.

How does the Eye work?

Now that you know what the eye is made up of and how each part contributes to form an image, watch this module to better understand how the eyes with the help of our brain, captures these images and how the eye works.

Light bouncing off objects in front of us enters our eye and passes through the iris and pupil to reach the lens. The lens then focuses these rays onto the retina, forming an image that can be interpreted by the brain. However, this image is upside down and must be flipped right side up by the brain.

Just think of the eye as this amazing camera that captures millions of images and records it in our memory.

Now for some people, the light passes through the pupil, but the lens cannot bend the light properly. It could be because the lens is wrongly shaped or the muscles that control the lens are weak. When light does not fall directly on the retina, you see a blurred image.

When the image falls in front of the retina, the person suffers from shortsightedness and can’t see distant objects clearly. When the image falls beyond the retina, the person suffers from longsightedness and can’t see nearby objects clearly. Both these problems can be easily fixed with a pair of spectacles.

Get more Information

Sense of Sight : The Eyeball

We see everything around us with the help of our eyes. Everything we see is an image. However, do we know how these images are created? Learn with the help of this animated learning module, about the various parts of the eyes and how each one helps in forming images that we see.

What is the Sense of Sight?

The sense of sight is the ability of the eyes to see objects around you. It is also the ability to perceive colour, brightness, depth. The sense of sight is considered to be one of the most complex of the five human senses. The eyeball is the organ that allows vision. It is an asymmetrical globe about the size of a ping pong ball.

Parts of the Eye

The main parts of the eye are

Cornea – It is a transparent dome that covers the coloured part of the eye, that allows it to focus on objects and regulate light passing through.

Iris – The coloured part of the eye. If a person has green eyes, it means he/she has a green iris.

Pupil – The black circle at the centre of the iris which lets light enter the eye.

Retina – The back part of the eyeball is called the retina. This is where the light should fall to create an image of what the eye sees.

Lens – The lens sits behind the iris and bends light to focus it to the retina.

Optical Nerve – This nerve sends the image to the brain which interprets the image and tells us what we are seeing.

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What is a Lunar Eclipse?

  • When the Earth moves between the sun and the moon, therefore blocking the sun’s rays from striking the moon, is called a lunar eclipse. This happens when the Sun, the Earth and the Moon are aligned closely with the Earth in the middle.
  • During a lunar eclipse, the Earth’s shadow can be seen on the moon’s surface. From the shape of the shadow, you can tell that the Earth is round.
  • A partial eclipse hides only a part of the moon while a total eclipse hides the moon entirely.

WHY LUNAR ECLIPSES OCCUR

  • The moon orbits around the Earth and the Earth circles around the sun. Every now and then, the Earth, the Sun and the Moon come in the middle. When this happens, the Earth’s shadow engulfs the moon.

PROGRESS OF AN ECLIPSE

  • During a total eclipse the moon looks red. This is because sunlight contains all the colours of the rainbow. The Earth’s atmosphere bends and scatters the colours. Red travels further than the other colours, and so it becomes the colour of the shadow of earth.

THINGS TO DO

  • To make a lunar eclipse you will need two oranges and a flashlight. Place the oranges in line about 8 inches apart. From about two feet away from the table, hold the flashlight at the same level of the oranges. What happens?
  • What is the difference between a lunar and solar eclipse?
  • Observe the colour changes during a lunar eclipse and draw a representation of the moon every time you see some change in colour.

For more interesting Geography articles and videos, visit our Geography for Kids category.

The Decline of the Harappan Civilization

History of Harappan Civilization

The city of Harappa was divided into two parts- The Citadel, which was home to the great public bath, as well as large residential buildings that housed around 5000 people. It also had two large assembly halls, but there is no evidence of the presence of any kings, priests, armies, palaces or temples. So the purpose of the Citadel is still unclear. The Lower City was laid out in a grid like pattern. Most of people lived here and seemed to have been traders or artisans.

They resided with others who were in the same profession as theirs. Potters’ kilns, dyers’ vats, metal working, bead making, shell making suggest that the people of Harappa had a wide range of occupations. Materials were procured from far-away places to make a wide range of things such as seals, beads and other artifacts.

Seals which were discovered during excavations had pictures of Gods, animals and other inscriptions. Some of these seals were used to stamp clay on trade goods. Goods made in the Indus valley traveled as far as Mesopotamia (present-day Iraq), Afghanistan and other parts of India. Jewelery that was discovered in the area suggests that the people of the Indus Valley had access to gold, copper and semi-precious stones.

The city had good flood control measures and irrigation systems in place.

In spite of this, evidence suggests that Mohenjo-daro was destroyed and rebuilt seven times. This was because of the damage caused by severe floods and the river changing its course. The entire city was wiped out. The repeated rebuilding process proves that their architects were dedicated workers and always dealt with nature’s forces. Extensive agricultural production and trade with Sumer (one of the oldest civilizations) in Southern Mesopotamia supported life at Harappa.

Weapons and tools were made from copper and bronze but not iron. Wheat, rice and a variety of vegetables and fruits were cultivated. A number of animals were domesticated and cotton was woven and dyed for clothing.

The people of Harappa seemed to have lived peaceful lives, with little fear of invasion. According to one theory, When the Aryans arrived from the Northwest, they hardly encountered any resistance from the Harappans. The Harappan people were overpowered by their superior military skills. All the cities fell one by one, weakened already by constant floods and rebuilding. Harappans, who were termed ‘Dasyus’ by the Aryans, either joined the lower sections of the Aryan community or fled south. This theory is no longer popular.

Drought and a slowdown in trade with Mesopotamia and Egypt are now thought to be more likely causes of the decline of the Indus Valley civilization.

The fall of Mohenjo-daro is a typical example of the decay of this great culture. It took another thousand years before a city as well-planned was built again.

Excavations reveal that the people of Harappa were technologically advanced and had an efficient system of governance in place.

Some artifacts that were excavated from the area include soapstone seals like the humped Brahmani bull and Pashupati. Other carved figures that were discovered include the bronze dancing girl and the statue of a priest and a man’s torso.

Stone implements and cave paintings from this period have been found in many parts of Asia. There is also evidence suggesting the domestication of animals, village settlements and wheel-turned pottery dating from the middle of the 6th century BC, which were discovered on the foothills of Singh and Baluchistan, both in Pakistan.

Archelogists, R.D. Bannerjee and Sir John Marshall rediscovered this historic site in the 1920s, giving the world a peek into ancient cultures and civilizations.

For more such interesting history articles and videos, visit History for Kids category.

Why do we Sneeze and Cough?

When we catch a cold, germs spread to our nose, throat and other air passages. Our body fights off the germs and produces a slimy mucus to get rid of them. Sneezing and coughing blows out the germs with the mucus.

Sneezing stops the tickling in our nose for a short while. It blows out the germs and mucus too.

When we cough, it helps clear our throat. We may cough up mucus from our lungs.

Other Reasons Why We Cough

Sometimes we sneeze if we look at the sun too long, or if dry peppers tickles our nose. If we eat our food too quickly and it goes down the wrong way, we have to cough to stop it from blocking our windpipe.

Sometimes It Hurts When We Cough

Sometimes we can’t help coughing, but if we cough too much it can make us very tired and gives us a sore throat too. So, it is a good idea to try to cough a little less.

When we feel that we are about to start coughing, we can take slow, deep breaths to try and stop it.

Sipping some warm water can get rid of the tickling in our chest too.

For more such biology articles and videos, visit: https://mocomi.com/learn/science/biology/

Indian Independence

Who declared Indian Independence?

Clement Attlee, the then Prime Minister of the British finally declared that India would be granted Independence. When news of this broke out, major political parties and communities, especially the Sikhs, the Congress and the Muslim League started negotiating.

The Partition of India

In 1947, The Muslim League launched Direct Action Day. Its purpose was to convey that an undivided India would no longer be possible.

On June 3rd, 1947, Lord Mountbatten, the last British Governor General in India announced the partitioning of India into a secular India and a Muslim Pakistan.

On August 14th, 1947, Pakistan was declared as a separate nation with Muhammed Ali Jinnah as its leader.

On August 15th, 1947, at the stroke of midnight, India was declared an independent nation.

While there were widespread celebrations across the country, this joyous period was also scarred with violent clashes between Hindus, Muslims and Sikhs. At least 500,000 thousand people were said to have been killed during this period and many women were abducted. Around 11 million Hindus, Muslims and Sikhs crossed borders.

In the midst of all this confusion and bloodshed, Prime Minister Jawaharlal Nehru requested Lord Mountbatten to continue as the Governor General until the next year, when he would be replaced by Rajagopalachari.

Assassination of Mahatma Gandhi

The year following independence, Gandhi was assassinated. The entire nation mourned his death. Two years following Gandhi’s death,’Bitstream Charter’, the constitution of India was drafted, and on 26th January, 1950, India was proclaimed a Republic. Dr. Rajendra Prasad became the first President of India, taking over the reigns from Rajagopalchari.

After decades of conflict, India finally tasted freedom. Even though India was free from the British, it retained some of its influence, especially in the educational system, the use of English Language, the printing press, cricket, etc.
Ever since India came into being, it has been a mix of diverse cultures and societies. India’s history has always been rich and interesting. It produced some of the greatest leaders the world has ever seen. In the last half century, India has grown at a staggering rate, that has brought it prominence on the world stage.

Many people predicted that India would break into smaller countries because of its cultural diversity. However, with all its problems, India has remained a sovereign country, one that is democratic and unique because of its cultural diversity. The constitution of India was drafted by Dr. B.R. Ambedkar, which was adopted when India became a Republic on January 26, 1950.

The state of Goa still remained under Portuguese rule, even after Independence. However, on December 19, 1961, it was annexed to India when the Indian Army, backed by the Air Force, ended the Portuguese rule. India fought its first war against China in 1962, which resulted in India’s defeat, as they were not prepared for such wars. However, in 1965, India emerged victorious in the war against Pakistan. India then went on to win the second Indo-Pak War in 1971. The result of this war was the creation of Bangladesh out of East Pakistan.

On May 18, 1974, India conducted its first nuclear test at Pokharan, Rajasthan, initiated by the then Prime Minister, Indira Gandhi. Since then many more scientific milestones have been achieved, like for example the Chandrayaan-1 space mission. India has also become a major hub in the field of Information Technology (IT) with a large number of foreign corporations setting up base in India.

India has also produced world-class scientists, doctors, engineers, journalists and sports-persons who have all excelled in their individual fields. Today, India, against all odds with over a billion people, stands as the largest democracy in the world.

India is fast catching up with the modern western world with tall buildings and huge malls. India is at third place, just after China and USA, where mobile phone users are confirmed. Bollywood, India’s film industry, produces almost about a 1000 films in a year, and has already surpassed Hollywood. India is poised to become one of the most fascinating and most visited countries of the world.

Wheel and Axle

When we have to move a real heavy load, we have to use a great deal of force to push it because of friction and gravitational force. A wheel and axle fixes this problem in a jiffy. Learn about this simple machine, and see how it reduces the effort required to move certain objects through this fun and animated learning module.

When we have to move a real heavy load, we have to use a great deal of force to push it, because of:

What is Friction:

Force resisting the motion of the object on the ground.

What is Gravitational force:

Force that pulls the object to the ground.

The “Wheel and axle” solves this problem in jiffy! In this simple machine, a wheel is locked to a central axle and they rotate each other when a force is applied on either one of them.

When we place a heavy load on the axle and push it, the rolling of the wheels reduces the friction to a large extent. However, the frictional force does not depend on the surface area of the object. The friction depends on its mass and what material it is made of. When there is less friction, it takes less force to move something.

The effort needed to overcome the resistance, acting upon the axle is relatively small.

We see the wheel and axle setup in many of our day to day activities.

A longer motion at the edge of the wheel is converted to a shorter, more powerful motion at the axle.

We see the wheel and axle setup in many of our day to day activities.

In reverse, a short powerful force at the axle will move the wheel’s edge at a greater distance.

Activity:
Where do you see a wheel and axle around ou? Hint- one is in something you use to get from place to place.

For more such interesting Physics videos and articles visit our Physics for Kids category.

Vedic Age (Vedic Period)

Vedic Age in India

The Aryan invaders were primarily nomads. They were not accustomed to the urban way of life and therefore did not occupy the beautiful cities they had conquered. Instead, they cleared forests near riverbanks and settled in small villages, or Gramas, becoming semi-agriculturists. Perhaps, their fear of permanent dwellings prevented them from moving into the cities. Each Grama was headed by a Gramini.

The Aryan villages were simple structures, which formed the basis for architecture in India. In fact, the caves of Ajanta and Ellora were influenced by early Aryan villages. Their huts were very basic, circular and with thatched roofs over bamboo logs. Fences of wood and bamboo surrounded the settlement for protection against wild animals.

Soon the demand for fertile land grew and rivalry spread. Groups of villages joined forces and thus small ‘cities’ or clans called ‘Vis’ were born. A group or clan formed a Jana and their leader was the Rajan or King. A priest or Purohit, the commandant or Senani, and the administration, Sabha and Samiti, assisted him.

The city buildings were made almost entirely from wood, and walls protected each city. The Vedic carpenters became skilled at constructing timber structures and their techniques were used in stone constructions of the future.

During this period, animal husbandry, agriculture, weaving, carpentry were the primary occupations. The barter system flourished. External trade began with West Asia and Egypt. Coins were introduced for trade and were called the ‘Nishka.’

The Aryans made the single largest contribution to Indian religion through Sanskrit. It was during this age that the Vedas were most composed. And this formed the foundation for the early Hindu religion.
The Aryans developed a rich tradition, composing hymns of the four Vedas. These sacred scriptures included the : Rig Veda, Sama Veda, Yajur Veda and Atharva Veda.

Two of the greatest epics were also composed during this period. ‘The Ramayana’ and ‘The Mahabharata.’ These tell us a great deal about the culture, society and religion of the people of that era.

It was during the Vedic age that the caste system was born. Due to work specialization, different classes of society developed. Besides the Brahmins, there were the Kshatriyas or warriors, the Vaishyas or merchants and Shudras or outcasts, who performed menial jobs like scavenging, fishing and removing dead bodies.

The status of the Brahmins and Kshatriyas improved greatly and the common people had little or no say in the administration. A lot of importance was placed on pronouncing the Vedic verses correctly, as it was believed, that this led to prosperity and success in war. Kshatriyas became richer and used the services of the Brahmins. The other castes were degraded and reached the lower rungs of society.

For more such interesting history articles and videos, visit History for Kids category.

Aurangzeb

Aurangzeb: The mughal emperor

Aurangzeb, born in 1618, was considered as the last great Mughal emperor. He was the third son of Shah Jahan and Mumtaz Mahal. By the time he turned 16, Shah Jahan gave him the post of the governor of Deccan. Aurangzeb moved to Kirki in the Deccan region, which he renamed, Aurangabad, after him. In 1637, he married Rabia Durrani and it was around this time that Shah Jahan began to favour his eldest son, Dara Shikoh.

Aurangzeb soon earned his father’s disfavour and was asked to step down from his post. However after mending ties with his father, he was made governor of Gujarat where he did well and was rewarded.

By 1647, he was made governor of Balkh and Badakhshan (present day Afghanistan and Tajikistan), replacing his ineffective brother, Murad Baksh.

These areas were constantly attacked by rebels and Aurangzeb managed to quell them with his military skills. When he was appointed as the governor of Multan and Sindh, he engaged in a long battle in an effort to capture Kandahar from the Safavid army. Unfortunately, Aurangzeb failed to do so, and once again earned his father’s anger.

Aurangzeb was once again appointed the governor of Deccan. He set out to expand the Mughal Empire but was stopped by his father and and eldest brother every time.

Soon after Shah Jahan fell ill, all his sons began to fight over the throne. Aurangzeb defeated his elder brother Dara’s armies and took his father as prisoner. Dara was condemned to death by his own brother.

He defeated his other brothers too and soon after took over the throne at Agra. Aurangzeb went on to rule for forty-nine years.

Establishment of Islamic law

Although Aurangzeb’s predecessors were tolerant towards all religions, Aurangzeb enforced strict Islamic law called the Fatwa-e-Alamgiri. He banned music, art and dance in his courts. He also destroyed images in art and architecture, as Muslim Law dictates. He destroyed many Hindu temples, prohibited religious meets and enforced unfair taxes on non-Muslims, which Akbar had removed. He also banned the practice of Sati and forced many to convert to Islam.

Aurangzeb now had the freedom of expanding his kingdom with no one in his way. He extended the Empire both in the Northwest and Northeast. His armies consisted of some 500,000 camp followers, 50,000 camels and 30,000 war elephants. In a quick span of time he invaded Punjab and Afghanistan and also tried to suppress territories owned by the Marathas in the west who were led by Shivaji. But these constant military campaigns drained his treasury. As a result, the peasants of the kingdom had to pay heavy taxes.

Because of his restrictive rule, Aurangzeb had many enemies, especially the Sikhs. When Aurangzeb insisted that all Kashmir Brahmins must convert to Islam, the hapless Kashmiris turned to the Sikh Guru, Tegh Bahadur, for help. Aurangzeb refused to listen to his pleas and insisted that he too must convert to Islam. When Tegh Bahadur refused, Aurangzeb had him executed which triggered a rebellion from the Sikhs.

Aurangzeb’s army continued to weaken. It was at this time that his new enemies, the Marathas attacked him. For 27 years the two armies fought many battles, and only after Shivaji’s death in 1680, did Aurangzeb and his army get some respite.

This relief was short lived as the Rajputs of Jodhpur and Mewar joined forces and rebelled against Aurangzeb. They declared themselves independent of their rule. Aurangzeb, sent his son to quell their rebellions, only to learn later that his son would deceive him. Akbar, Aurangzeb’s son declared himself King and soon fled to the Deccan where he allied with Shivaji’s son, Sambhaji. Aurangzeb later sent his son into exile in Persia, from where he never returned. Aurangzeb then later captured Sambhaji and killed him.

The decline of the Empire however had already begun. Aurangzeb’s political power had weakened because of the time he spent on military matters. His governors and generals became powerful and many declared themselves independent rulers. His harsh rule, alienated the Hindus and the peasants, who lived in utter poverty.

Aurangzeb breathed his last in 1707. The Empire was no longer an effective force though it officially came to an end in 1857 when Emperor Bahadur Shah Zafar was put on trial. It was at this time that the Mughal Empire was completely wiped out.

The Sikhs established their empire in Punjab, after Aurangzeb’s death. Charat Singh established his stronghold in Gujranwala in 1763. Maharaja Ranjit Singh was the most powerful of all Sikh rulers and ruled for over forty years. He was also known as the ‘Lion of Punjab’ and died due to paralysis in 1839. After his death the Sikh Empire was divided into small principalities.

For more interesting History articles and videos, go to : History for Kids

The Floating Egg

REQUIREMENTS:-

  • 2 glasses
  • Water
  • Salt
  • 2 eggs

WHAT TO DO:-

Place the glasses together and fill them up half way. Now add one egg into one of the glasses. In the other glass, add 3-4 tea-spoons full of salt and stir well. Place the second egg into this solution.

WHAT HAPPENS:-

When an egg was placed in the undiluted solution of water, you would have noticed that the egg sank to the bottom of the glass. On the other hand, the egg that was added to the saltwater solution came up to the top and remained afloat.

WHY THIS HAPPENS:-

The egg sinks in the first glass because the density of the egg was more than the density of fresh water. However, after adding salt to the solution, the density of water increased and was more than the density of the egg, thus enabling it to float.
TRY THIS
Find out if you can use other materials to conduct this experiment and see the results.

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What is Sustainability?

Sustainability Definition

The dictionary has several meanings for the word sustainability, some of which include ideas like maintain, support, endure, and withstand. By the 1980’s the word came to be used most commonly to refer to maintaining the world we live in. The underlying idea behind sustainability is that we must act responsibly about the products we consume in order to be able to support the billions of people on this planet forever.

Why is sustainability important?

There are a limited amount of resources in the world that humans must extract from the very earth in order to produce houses, cars, computers, and pretty much everything else. When we use the word sustainability to mean maintain, it means to maintain it forever. This is because our actions have a lasting effect on the environment and we should protect it for our future generations.

If you want to figure out if something is sustainable you should ask yourself the question- can I do this forever?

Let’s take a look at the product plastic to understand this idea a little more. Plastic was introduced in the early 1900’s but only became a mass produced material with multiple uses after WWII. By the 1990’s we were using plastic for everything from containers for food, to lamps, toys, bottles, bags and much much more. Now if we ask the question ‘can I do this forever?’ to the case of plastic, the answer is yes. But plastic takes millions of years to decompose and so the problem lies with what happens to all this plastic when we’re done using it?

By producing all this plastic that we do not use forever, and since it takes nature a very long time to make it decompose, we end up with large amounts of plastic that is just taking up space on earth. Therefore using plastic is not sustainable. Plastic is just ONE example of unsustainable consumption.

How to help sustainability grow?

Lifestyle

Your lifestyle is your choice and you can change it. For example, when you go to the grocery store, make sure you always carry a cloth bag. This way the shopkeeper does not have to give you many plastic bags

Fixing

If your watch, or a toy, or a camera is broken or not working, try getting it fixed before you buy yourself a new one

Recycle

Try and be conscious about the things around you. When you consume something, see if you can re-use it later.

Needs vs Wants

Before you buy something, ask yourself the question- do I NEED this or do I WANT it?
Remember sustainability begins with you. So act locally and think globally.
Can you find out some other products that are highly unsustainable?

For more environment related articles and videos, visit: Environment for Kids category.

The Early Mughals

Interesting facts and information about the Early Mughals

India’s reputation of being the only known source of diamond mines in the world and its flourishing international trade attracted many invaders. North Indian kingdoms resisted invasions by Arab-Turks for centuries but soon, small Islamic Empires or Sultanates were established in several parts of the North.

Before these invasions, Muslim trading communities who arrived from Arabia in small numbers via the Indian Ocean, were already trading in coastal South India, especially Kerela.

Arabs, Turks and Afghans invaded parts of North India and established the Delhi sultanate in the former Rajput regions during the twelfth and thirteenth century.

The Delhi Sultans

There was a great impact on culture with the establishment of the Delhi Sultanate. An Indo-Muslim culture evolved and this could be seen in architecture, music, literature and religion. The language of Urdu was developed at this time which is said to be a mix of Sanskrit, Persian, Turkish and Arabic. The Delhi Sultanate was the only Indo-Islamic Empire which placed Razia Sultan, a woman, on the throne.

Qutb-ud-din Aybak was responsible for establishing the Delhi Sultanate. Shams-ud-din Iltumish then later established a Turkish Kingdom in Delhi, which enabled future Sultans to conquer Kingdoms in different directions. The Delhi sultanate, over the next few centuries extended its kingdom right up to Bengal and the Deccan.

Timur, a Turkish-Mongol conqueror, launched a massive campaign to invade India. He attacked Sultan Nasir-ud-din Mehmud of the Tughlaq Dynasty in Delhi, leaving the city in ruins.

This led to the fall of the Delhi Sultanate and the emergence of Mughal rule in India.

Zahir-ud-din Muhammad Babur

Zahir-ud-din Muhammad Babur was the founder of the Mughal Empire. He was the descendant of Timur and Genghis Khan. His armies who invaded India under his leadership compromised of Turkish, Persian and Pashtun soldiers. Babur with the help of his armies defeated the last of the Sultans, Ibrahim Shah Lodhi in the First Battle of Panipat in 1526. Even though Babur’s army was smaller in size, his 12,000 men who were well trained succeeded in beating an army of more than a 100,000 men. Babur however, did have the advantage of superior cavalry tactics, firearms and guns.

Babur then went on to crush, Rana Sanga of Chittor and achieved many other military victories. However, just five years into his reign, he passed away. His biggest legacy was that he left a set of descendants who fulfilled his dream of an Islamic Empire in India.

Humayun

Babur was succeeded by his son, Humayun. At the age of 12, his father appointed him as the governor of Badakshan, and this is where he proved his administrative skills and bravery.

However, after ascending the throne, his people realized that he lacked his father’s clever and crafty mind, even though he was a great soldier. He got addicted to the luxuries of the palace and did not take much action against the Rajputs and Afghans who were conspiring against him.

Even his own brothers conspired against him, but he refused to believe it and gave them positions of power. Sher Shah Suri, an Afghan general who served under Babur was one of Humayun’s biggest threats. Humayun thought that Sher Shah Suri had a small army and therefore, he chose to ignore him. But in reality, Sher Shah had gathered an impressive number of Afghan soldiers who were loyal and well trained.

After realising that there was reason for feeling threatened, Humayun marched to Chunar, Sher Shah’s territory, while the latter was away at Gaur. But in spite of the absence of their leader, his men fought fiercely and Humayun was forced to retreat.

Sher Shah in the meantime, went about capturing Bihar and Jaunpur which was under Mughal rule. Facing humiliation, Humayun clashed with Sher Shah two more times. The first battle was at Chausa where he and his men suffered a crushing defeat and Humayun barely escaped with his life. The second battle at Kannauj brought an end to Humayun’s reign. Afghan rule was established with the capture of Delhi and Agra.

Humayun fled to Persia where he lived in exile for 15 years after being betrayed by his brothers. In exile, his wife gave birth to their son, Akbar.

After the death of Sher Shah Suri, his empire began to crumble as his successor could not re-create Sher Shah’s magic.

Humayun on realizing this, put an army together with the help of a Persian King and marched towards Delhi. The following year, he managed to capture Delhi, along with Kabul and Kandahar and defeated Sikander Suri, Sher Shah’s successor, ascending the throne at Agra, thus bringing an end to his days in exile.

His years in exile changed him. After ascending the throne, Humayun devoted his time to the State. His greatest achievements lay in the field of painting. He brought several painters from Persia and they laid the foundation for Mughal art and style. From here on, there was a fusion of Persian and Indian styles.

Humayun’s reign was short-lived. He died in a tragic accident after falling off his library steps. He was succeeded by his son Akbar, who went on to become on of the greatest Mughal kings ever known.

For more interesting History articles and videos, go to : History for Kids

Sepoy Mutiny – Revolt of 1857

Indian Rebellion of 1857

During the British Raj, there was unrest and discontent amongst the people of India. Soon, many rebellions followed in various parts of the country. There were several causes which led to this. One of them being that the Hindu soldiers protested against the addition of Gurkha, Sikh and lower caste soldiers to their ranks. Economic policies of the British had an adverse effect on the soldiers’ families back home.

The use of animal grease on the cartridges of the newly introduced Enfield rifles was the last straw. While loading the rifles, soldiers had to bite off the end of the cartridges. It was made up of either pig or cow fat, which violated the religious sentiments of the Muslim and Hindu soldiers.

In 1857, three regiments of the army refused to use the ammunition for the Enfield rifles. These men were disbanded. Then later another 85 soldiers disobeyed orders to load their rifles. They were arrested. The rest of the soldiers mutinied on May 19, 1857. These men marched on to Delhi and demanded that the last Mughal Emperor, Bahadur Shah Zafar, take over as the ruler of India and the head of the rebels. Though he reluctantly agreed, the British defeated him and sent him into exile in Burma, where he died in 1862.

This uprising came to be known as the Sepoy Mutiny or the Revolt of of 1857. Mangal Pandey is the most famous figure of this uprising who attacked the British regiment. He was later arrested and hanged.

Soon after, another regiment revolted. Ninety thousand men from the Bengal Army joined the mutiny. Initially the British suffered heavy casualties as they were unable to respond to the uprising. After suffering major losses in Kanpur and Lucknow, the British sought the help of the loyal Sikh and Gurkha forces. The British with their help managed to ward off the army of rebels near Delhi.

In response to the mutiny, the British Parliament passed an act, abolishing the East India Company. India became a crown colony to be governed by the British Parliament directly. A British cabinet member, the Secretary of State for India, and the Governor General looked after Indian affairs.

In the following year, the title of Viceroy was bestowed upon the Governor-General of India by Queen Victoria. She introduced a policy of ‘Divide and Rule’ which prevented Indians from uniting to rebel against her. By implementing this, the British sought accommodations with Princes and landlords, in turn allowing them a degree of freedom. This ensured their loyalty. The army was reorganized to avoid further conspiracies.

The British turned their attention to commerce and development. The first step was the building of a transport system to move imported British ready made goods and to export Indian raw materials. Construction of the railroad and railway stations began and many new towns came into existence just to transport Indian resources to the markets. New roads were built, a new communications system came into existence and a harbour was built in Bombay.

During this period the conditions of the poor worsened. Village artisans went broke as a result of competition from English machine-made goods. Many were forced into poverty with the destruction of the Indian craft industry.

They were forced to turn to tilling land for a living.

During the American Civil War, Indian agriculture shifted from foodstuffs to cotton for supply to the English textile industry. This and a severe drought in the 1870s led to a terrible famine that spread throughout the country of India.

For more interesting History articles and videos, go to : History for Kids

Maurya Dynasty

Chandragupta Maurya: The founder of the Maurya Empire

Right after Alexander’s departure from India, one of India’s greatest rulers, Chandragupta Maurya, founder of the Maurya Dynasty, invaded central and western India. With Pataliputra (near Patna) as it’s capital, he had occupied north western India in its entirety by the year 316 BC.

Chanakya (Kauṭilya)

The great strategist and minister Chanakya (also known as Kautilya) was one of Chandragupta Maurya’s closest advisors. At Chanakya’s behest, Chandragupta took over Magadha from the Nanda dynasty.

With the aid of an intelligence network filled with young recruits from Magadha and other provinces, Chandragupta kept a close eye on the happenings within his kingdom and elsewhere. These recruits were the ones who were upset with the corrupt rule of King Dhana of Magadha. Chandragupta gathered enough of such recruits and resources needed for his army to fight long battles. The men included the former General of Taxila and accomplished students of Chanakya.

Eventually, with an elaborate plan and perseverance, Chandragupta took over the throne of Magadha. His empire went on to become one of the most widespread across India known for its great political and military rule. The empire stretched north, all the way up to the Himalayas and eastward till modern day Assam. To the west the kingdom reached present day Pakistan and parts of Afghanistan.

During this time, Chanakya went on to write the Arthashastra, one of the greatest collections of observations and manuals on economics, politics, foreign affairs, administration, warfare, military arts and religion known to man.

Under Chandragupta’s rule a single currency was established all across India. Through regional governors and administrators he governed deep into his kingdom. Justice and security of his subjects was paramount and he established strong practices to ensure that law and order was maintained. Trade and agriculture also flourished in his rule along with an efficient system for finance and administration.

The Mauryan army brought peace upon the land by wiping out bandits, gangs, private armies and powerful chiefs who tried to establish their rule. Many public works including road and water ways were built to help with travel and trade.

In 305 BC,the Greek ruler Seleucus I, ruler of the Seleucid Empire, attacked Northern India to reclaim parts of their earlier kingdoms. The campaign failed and eventually the two rulers signed a peace treaty under which the Greek ruler received 500 elephants from Chandragupta. These elephants helped Seleucus I in his conquests abroad. This also opened up a deeper friendship between the Indians and the Greeks. Greek historians and scholars like Megasthenes, Deimakos and Dionysius attended Chandragupta’s court.

In Chandragupta’s reign Jainism gained huge popularity. Jain temples and stupas were built across the length and breadth of his kingdom. As Chandragupta grew old he renounced his throne and all his wealth and joined a group of wandering monks.

Chandragupta was succeeded by his son, Bindusara around 298 BC. After Bindusura, came Ashokavardhan Maurya, better known as Ashoka the Great, one of the greatest emperors that India had ever seen.

For more interesting History articles and videos, go to : https://mocomi.com/learn/history/

How does a Straw Work?

WHAT YOU NEED

  • A drinking straw
  • A glass of cola

WHAT TO DO

Suck from the straw and cover the other end of the straw with your finger and lift it up out of the cola.
Now, remove your finger while bringing the straw to the table.

WHY THIS HAPPENS

When your finger had the straw covered, the cola remained in the straw. When you removed your finger, the cola flowed out.
The finger on the straw lessened the pressure of air from above the straw. The greater pressure of air under the straw holds the cola.

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Indian Freedom Struggle

There was a heartfelt beginning to the freedom struggle. Men who are known for their peaceful methods such as Swami Vivekananda, Ramakrishna Paramahamsa, Aurobindo, Rabindranath Tagore and many others started spreading the word to the people that everyone must be passionate about gaining freedom.

When news of World War I broke out, the British declared that Indians would be fighting for them against Germany. A large number of Indian soldiers served abroad. When the war came to an end, the British imposed stricter legislation in India to curb those people they felt were political extremists.

To make up for the expenses incurred during the war, the British imposed higher taxes on Indians and even disrupted trade. Indian soldiers in the meantime smuggled arms into India to overthrow the British.

Mohandas Karamchand Gandhi

While all hope was diminishing, emerged a man whom the country began to revere, Mohandas Karamchand Gandhi. Gandhi became the undisputed leader of the freedom struggle.

Gandhi was a leader in South Africa during the anti-apartheid movement. He advocated the policy of Satyagraha and civil disobedience. Mahatma Gandhi as he was known, inspired millions to follow his path. His vision took the freedom struggle to the national level.

The Rowlatt Act

In 1919 an Act was passed which allowed the government the right to silence the press, arrest political activists or anyone they felt suspicious and keep them in prison without a trial. This Act was called the Rowlatt Act, also notoriously known as the Black Act.

The Jallianwala Bagh tragedy

On April 13, the British led by General Dyer massacred hundreds of unarmed civilians, including women and children, who were attending a meeting. This incident is known as the Jallianwala Bagh tragedy in Amritsar, which triggered off nation-wide hatred for the British rule.

Gandhi launched the Non-Cooperation Movement in response to this tragedy. He called for the boycott of British educational institutions and courts. He urged the people to refuse to pay taxes and forsake British titles or honours. This was a serious problem for the Government.

In 1920, a new, reorganized Congress was formed with freedom as their only goal. It is here where some of our most prominent leaders emerged, Jawaharlal Nehru, Subhash Chandra Bose and Vallabhai Patel to name a few.

Complete Independence

These new leaders called for complete independence from the British and threatened nation-wide civil disobedience. Gandhi embarked on a march of about 400 kilometers from Ahmedabad to Dandi famously known as the ‘Salt Satyagraha’ or the ‘Dandi March’. This was to protest against British taxes on salt, and at Dandi, the law was broken by making their own salt from seawater.

The British responded by making wide-spread arrests and firing on the crowds. Gandhi too, was sent to jail a number of times.

The Government of India Act

The Congress party and the government were at loggerheads for the next few years. In 1935, the British passed the Government of India Act, a last ditch effort to restore British rule in India. The Act called for an election and the Congress emerged as the dominant party. During this time the rift between the Congress and the Muslim League continued to grow.

Muhammad Ali Jinnah

Muhammad Ali Jinnah, President of the Muslim League, insisted that a separate Muslim state be carved out of British India to safeguard the interests of the Muslim community. This state would go on to be called Pakistan.

Bhagat Singh and Chandrasekhar Azad

During this period, armed rebellions against the British continued to grow in several parts of India. Shops were looted, a large number of people were murdered and many revolutionaries were captured and imprisoned. Leaders such as Bhagat Singh and Chandrasekhar Azad led acts of violence against the British. But soon the revolutionary activities died down and many rebel leaders joined political parties.

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Chola Dynasty (Chola Kingdom)

This is the story about the Chola Dynasty which is believed to have originated from the fertile valley of the river Kaveri. By the turn of the 8th century, there were three prominent kingdoms of the South, the Cheras, the Pandyas and the Cholas who were considered to be the most powerful of the three.

The History of Chola Empire

The year 985 saw one of the greatest kings of Southern India ascend the throne, Rajaraja Chola I also known as Rajaraja, the Great, who defeated the Eastern Chalukyas of Vengi, the Pandyas of Madurai and the Gangas of Mysore. His campaign of expansion included the capture of Sri Lanka, which remained under the Chola rule for 75 years. He also conquered the islands of the Maldives and even sent missions to Indonesia.

Being an able administrator and a great lover of architecture, he commissioned the building of the magnificent temple of Tanjore. The temple is named ‘Rajarajeshwar’ after him.

Rajendra Chola, the heir and son of Rajaraja Chola I, took over the kingdom after his father’s death and was an able ruler, just like him. His greatest achievement included the conquest of the Andaman and Nicobar islands.

Rajendra Chola then later attacked the Western Chalukyas and their allies. He conquered lands right upto the banks of the river Ganga. From the holy river, he collected the sacred water in golden pots and poured it into a tank he called Chola Ganga. He then adopted the title of Gangaikonda, which means Victor of the Ganga.

The period under his reign came to be known as the Golden Age of the Cholas. Art, music, dance, poetry, drama, sculpture, painting, philosophy and religion, all reached new heights. Temples were the center of all activities where the courtyard served as a school for students who were taught ancient Vedas and scriptures. It was also built to be used as a shelter by the people in case of an emergency.

This was also a time of religion and the worship of Lord Shiva increased in popularity. The Tamil language received great encouragement and many beautiful works of Tamil literature came about during this period. The famous poet Kamban lived during this period and his work ‘Ramavatharam’ is one of the greatest epics of Tamil literature.

The Cholas continued to lay much emphasis on architecture. Magnificent temples were built, the Brihadiswara temple at Tanjore is a prime example. Another famed art form of the time, were the carved bronze statues. The Natraja and the Ardhanarishwara are famous examples of this art form.

Following Rajendra’s rule, three of his sons and one grandson succeeded him. Thereafter, a new line of Chalukya-Cholas ascended the throne. The Eastern Chalukyas and the Cholas had inter-married through the generations and thus a new clan was born. Rajendra Chola’s daughter was married to the Chalukya Prince, Vimaladitya.

One of the Chalukya-Chola rulers was Rajendra II, an Eastern Chalukyan prince, who called himself ‘Kulottunga’ or ‘Star of the Dynasty.’ Under his rule, Sri Lanka gained independence from the Chola Rule. His reign was of peace and prosperity. Trade with Southeast Asia flourised, with many diplomatic missions sent to China.

Around the year 1118 however, the Chalukya-Chola rulers lost control of Vengi to the Western Chalukya king, Vikramaditya VI. The future Chola kings all faced trouble in one way or the other. They were constantly assaulted. By the thirteenth century, the Pandyan monarchs were gaining strength. The Chola Dynasty shrank to the region around Tanjore and soon came to an end when the last Chola King, Rajaraja III died.

PROJECT

  • The earliest of the Cholas date back to which time period?
  • Apart from capturing foreign lands such as Sri Lanka, the Maldives and Indonesia, which other countries did the Cholas have a hold on?
  • The history of the Cholas falls into four periods. What are those four periods called?

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Chera Dynasty

Chera Dynasty – Kingdoms of South India

The lands south of the Mauryan Empire which included the Malabar coast, Karur, Coimbatore and Salem districts in South India were all part of the Chera Dynasty. The Chera capital was Tiruvanchikulam.

Utiyan Cheralatan was the first Chera king and is accredited with founding the dynasty. One of his battles was against the Cholas where he suffered a humiliating defeat as a result of which he committed suicide.

Utiyan’s son, Imayavaramban Nedun Cheralatan, through his grit and determination was responsible for making the Chera dynasty one of the most powerful kingdoms in the south. His rule lasted 58 years and during this time he won multiple battles and wars, the most famous of which was against his sworn enemies, the Kadambas of Banasvi.

Imayavaramban not only extended his kingdom, he also supported the local arts, culture and literature during his reign.

Yet, the greatest Chera king was to follow – King Kadalpirakottiya Vel Kelu Kuttuvan. The great Tamil epic, Silappadigaram ( which means the jeweled anklet) which tells the story about a mythical hero is supposed to be about him. There were two other epic works during that time which were Manimegalai and Sivagami Sindamani.

Kuttavan established the Patni (wife) cult which says that a wife must be completely devoted to her husband. An example of this is the story of the faithful wife Kannagi, who is remembered even today.

Kuttavan is also said to have achieved the famous victories at Mogur Mannan and Kongar.

The Chera kings used marriage to strengthen their ties with other clans as they were constantly warring with their neighbors and needed to strengthen their positions. With strong overseas links with places like Rome, the kingdom prospered immensely. The trade consisted mainly of spices, ivory and sandalwood. They also exported pearls and gems to the Middle East.

The Kalabhras

This period of success was followed by the Kalabhras overthrowing the Cheras. The Chera dynasty however, overthrew the Kalabhras and the second Chera Empire was founded with Mahodyapuram as their capital.

Mahodayapuram was founded by Kulasekhara Alvar, one of the twelve Alvars or Saints who sang hymns and composed songs in praise of their beloved Lord Vishnu. The Bhakti movement of south India established by the Alvars.

Kulasekhara Alvar authored five dramas ‘Perumal Tirumozhi,’ ‘Mukundamala,’ ‘Tapatisavarna,’ ‘Subhadradhamala’ and ‘Vichchinnabhiseka.’ He was a renowned scholar and lover of art.

Kulasekhara was succeeded by Rajasekhara Varman Rul. He was followed by Sthanu Ravi Varman who was friendly with the Cholas. During his time, trade flourished with China and Kerala amongst other places.

However, with Sthanu’s death, the relationship between the Cheras and Cholas turned sour. The last Chera King was Rama Varma Kulasekhara who shifted his capital to Quilon. After his death, the Chera dynasty disintegrated and the Cholas took over.

For more interesting History articles and videos, go to : History for Kids