What is the difference between warm-blooded and cold-blooded animals? Warm-blooded animals generate their own heat and retain it with the help of feathers, fur and fat. Their body temperature is regulated by the brain. Cold-blooded animals cannot regulate their body temperature from within and their...
What is colour blindness? Eyes have two types of light-sensitive cells rods and cones. Rods help us see shades of grey. Cones help us see colours. People with colour blindness have defective cones. It also happens that information gathered by cones may not be conveyed...
Who was Nebuchadnezzar? Nebuchadnezzar was the ruler of Babylon. He made Babylon one of the richest cities in the world. It was he who created the famous ‘Hanging gardens’ which was one of the seven wonders of the world. For the gardens he brought plants...
What is the difference between a meteor and a meteorite? Meteoroids are small lumps of rock or ice. They become visible when they collide with the earth’s atmosphere. Then they are seen as streaks of light or meteors, also called ‘shooting stars.’ Meteorites are just...
How is a rainbow formed? Rainbows are usually seen soon after a summer rain. It happens when sunlight shines through raindrops which are still present in the air. Light, which appears to be white in colour, is actually a combination of colours like violet, indigo,...
Why do parts of our body fall asleep? This is caused by the compression of nerves between a bone and another hard object or hindrance in blood circulation. This happens when we are in the same position for some time. When the nerve is under...
How did baby kangaroos get the name, ‘Joey’? A Kangaroos are found mostly in Australia. The aborigines or native Australians used to call the baby kangaroos ‘joeys’. After the British settlers arrived in Australia they also began to use the same word, spelling it the...
Why do people get hiccups? Many people have suffered an embarrassing moment because of hiccups, for they occur without warning. Hiccups occur when the diaphragm, a muscle which is located between the lungs and the abdomen, draws air into the lungs in sudden, jerky movements....
What are albino animals? Albino animals are white in colour but it is not their normal colouring. Examples are white crows. The parents of an albino offspring have “no colour” genes as well as genes for colour. Very rarely, an animal inherits a no colour...
What is a tornado? A tornado is a funnel-shaped windstorm which is powerful enough to uproot houses, trees and whatever it encounters on its path. It can leave a trail of destruction that will take months to recover from. Tornadoes are formed in clouds. When...
