5Ws & H For Kids

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Who, What, Where, When, Why & How?

Who, what, where, when, why & how? Our online science magazine for kids tries to answer all your questions on science, environment, earth, geography, health, living beings, exploration and discoveries. You will find features on shooting stars, ocean depths, dinosaurs, satellites, ham radios, hiccups, and much more. Enter this fascinating kids science zone and find the answers to all your questions about the world around you.


210 items in this section. Displaying page 1 of 21

How Do Fish Survive in Icy Waters?

How Do Fish Survive in Icy Waters?

In cold winter months, lakes and rivers freeze over forming ice. Yet, fish and other aquatic animals manage to survive. Animals like seals, penguins, walruses and a wide variety of sea birds are all fish eaters. They live in the Arctic and Antarctic Circle, amidst the icecaps. The land is completely frozen. Yet these animals manage to live in this region. How do they do it? The icy waters of the Arctic and Antarctic Oceans support a great amount of marine life....

What is Artificial Intelligence?

What is Artificial Intelligence?

If you touch a hot metal object, you will yank your hand away immediately. When this happens to you the first time, the sequence of events and the result (the burning of your hand) gets stored in your brain. This is what we call an experience. When you see a hot metal object next time, you will not touch it. You will use the knowledge of your previous experience and decide to not repeat it again....

Which Mammal lays Eggs?

Which Mammal lays Eggs?

Mammals are creatures who give birth to their young ones as opposed to other animals who lay eggs. Birds, reptiles and insects lay eggs. But as with every other rule, this one has exceptions* too. An exceptional exception The duck-billed platypus of Australia walks out of fresh waters to build its nest on the ground. But it has retained its love of water and returns to streams and ponds to eat crayfish, snails, and shrimp. The most remarkable feature in the platypus is that although it is a mammal, it lays eggs!...

Why's the Sun Red during Sunrise and Sunset?

Why's the Sun Red during Sunrise and Sunset?

As day breaks, a reddish-white ball of light that we call the sun, rises. This red haze gives way to a golden-white sheen as the day advances and reappears when the sun sets in the evening. Does the sun really change colours, or does it only seem so? The explanation lies in-between. Light from the sun consists of three kinds of radiation – ultra-violet rays, visible light and infra-red rays. Unlike visible light, ultra-violet rays and infra-red rays cannot be seen....

What is a virus?

What is a virus?

Viruses are these tiny, invisible structures that cause infections. They make us sick. There are millions of viruses in our environment but only about 5000 have been identified by scientists. The ones you may have heard of are the Human Immunodeficiency Virus or HIV and the Novel Coronavirus or Covid-19. What do viruses look like? Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) illustration, created at the Centers for Disease Control and Prevention (CDC) Do you think that a virus is some creepy, crawly thing?...

How does a Nuclear Bomb differ from a Conventional Bomb?

How does a Nuclear Bomb differ from a Conventional Bomb?

Every now and then we hear of countries of the world carrying out heated discussions about nuclear bombs. The topics range from who has the right to own a nuclear bomb and who does not, who should use it and who must not and so on. But what exactly happens when such a bomb actually explodes? And how are nuclear bombs different from conventional bombs? The greatest difference between the two types of bombs is the sheer scale of destruction they cause....

What Makes the Egg Shell so Strong?

What Makes the Egg Shell so Strong?

Have you ever wondered why hens don’t break their eggs when they sit on them? The secret lies in the shape of the egg. An egg is a great example of nature’s excellent skills in packing. If you squeeze the ends of an egg between the palms of your hands, it won’t break. However, if you squeeze it in the middle, it pops and creates a terrible mess. If you have seen the way eggs are sold in the market, you would have noticed that they are kept with their ends pointing up and are never left lying horizontally....

Why do Plants Lean Toward Sunlight?

Why do Plants Lean Toward Sunlight?

Plants kept inside a room always grow in the direction of the window. In woodlands where there is a thick canopy of trees and sunlight rarely falls on earth, very few plants survive. Those that do, do not require sunlight to make their food. People have long wondered about this phenomenon until the answer was discovered and explained by the English naturalist Charles Darwin. He demonstrated that the growing shoot of a grass seedling always bends towards light....

Who Invented The Pen?

Who Invented The Pen?

The history of writing instruments with which humans have recorded and conveyed thoughts, feelings and grocery lists, is the history of civilisation itself. This is how we know about our ancestors and their lives. The handy sharpened-stone, used for skinning and killing animals was adapted into the first writing instrument. Around 24,000 BC, the cave man started drawing pictures with the stone onto the walls of his cave dwelling. His drawings showed events in daily life such as the planting of crops or hunting victories....

Where Did Numerals Originate?

Where Did Numerals Originate?

We deal with numbers all the time. Not just while doing math lessons at school, but also while counting money at the shop, memorising the numbers of our favourite TV channels or even keeping tabs on the number of hours we spend in front of the Internet! But we are so used to numbers that it has never occurred to us to find out where these numbers come from. For that, we must travel back in time....

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