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How did we discover that the Earth is round? About 3000 years ago people believed that the Earth was flat. But people wondered why ships disappeared at the horizon. Sailors too returned from journeys and were proof that ships did not fall off the edge of the Earth. The simplest explanation was: the Earth must be round. The final proof came in the year 1522 after the expedition of Ferdinand Magellan, who was the first to sail around the Earth.
Why do we not fall off from the Earth? Gravity is the force of the Earth that attracts every object towards itself. From our perspective this force always acts downwards. For a long time people did not believe that the Earth is round because then the people 鈥榰nderneath鈥?the sphere would have actually fallen down. In 1687, a physicist , Issac Newton, proved that the force of gravity always acts towards the centre of the Earth. On the Earth Philipp Grubauer Jersey Youth , the force of gravitation always acts 鈥榙ownwards鈥?irrespective of Eskimos in the Arctic region, people in Europe or inhabitants of Australia.
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Total Views: 82Word Count: 498See All articles From Author
A business teaching what you know to kids is a great way to make money doing something you love. But Mikko Rantanen Jersey Youth , whether you will teach private singing or sewing lessons or group dance or karate classes, there are a few questions you should answer before taking the plunge into this type of business.
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