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Why does the sun shine?

The reaction that takes place on sun called “nuclear fusion” helps in producing light & heat. The temperature on the surface of the sun is about 6,000 degrees centigrade. This is hot enough to change any metal or rock into a gas. Scientists believe that the heat of the sun is the result of a process similar to an atom bomb that takes place. The sun changes matter into energy. This is different from burning. Burning changes matter from one form to another. But when matter is changed into energy, very little matter is needed to produce a great deal of energy. Twenty-eight grams of matter could produce enough energy to melt more than a million tones of rock! The sun keeps shining because of it is constantly changing matter into energy. And just one per cent of the sun's mass would provide enough energy to keep it hot for sun thousand million years!

 

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Submitted By:varsha.s.d
Date: 8/9/2009
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