What is lightning? When something has an electric charge, ether positive or negative, the electricity tries o ‘low away to nearby objects. The charge tries to spread itself out evenly. This is why electricity sparks from the comb to your hand as shown opposite. The electric charge jumps across the narrow gap through the air. An American inventor who lived 200 years ago, Benjamin Franklin, thought that lightning was something to...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
How can your comb pick up a piece of paper? Have you ever noticed that if your hair is dry and you comb it with a plastic comb it flies out, each hair seeming to float away from the others ! Have you ever seen bits of dust or paper cling to the comb you have just used these strange things are due to electricity. When you comb your hair, this...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
What made man want to paint? The earliest forms of art by primitive man were an expression of his feelings about life. He was essentially a hunter and he believed that by drawing images of animals such as bison, mammoth or reindeer, and the weapons he used to slay these animals, he was symbolically giving strength to his ability to kill them. He considered his pictures had a spiritual force...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
Do any people today live in the same kind of houses as their ancestors ? There are many parts of the world where primitive man, living a tribal life, did not develop in areas of science, literature and discovery, that is, he remained uncivilised. And later, not touched by technology, he felt no need to change. But he firmly established through essential crafts, arts and customs, his culture, that is, his...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
What was the first style in architecture? The dwelling that pre-historic man made for himself about two and a half million years ago, was a cave, so the first style of architecture was little more than a rock with a natural hole in it ! This early man spoke no language and was only concerned with finding food to survive a very basic existence. We do not know how man learned...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
How do Crocodiles build their nests? Crocodiles are egg-laying reptiles, and the first thing a female must do after she has mated is build a nest. Most species scoop up mud and plants in their jaws and build a mound of rotting vegetation. Then the female makes a hollow in the center and lays anything from 20 to 70 eggs in it. Afterwards, she covers them up and leaves them, but...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
How do Crocodiles find their mates? Crocodiles find each other during the mating season by using their sense of hearing and their sense of smell. When the mating season arrives, the males start calling for females with loud, intermittent bellows. These bellows can be heard from a considerable distance. Crocodiles also have two sets of special scent glands that are situated on the underside of the body. When the animal is...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
How do Crocodiles catch their prey? Crocodiles live in sluggish streams and lakes, often floating without movement for hours on end, so that an unwary creature might take them for dead. It would soon learn its mistake! When a crocodile wants to move, it can move very fast indeed. Waiting a little way out from the shore, it will bide its time until, suddenly, swimming strongly and silently with vigorous movements...
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September 12, 2017 evirtualguru_ajaygour10th Class, 9th Class, Class 11, Class 12, General KnowledgeNo Comment
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