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Name the source of energy in sun and stars.


Nuclear fusion is the source of energy in sun and stars. 
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List any four sources of energy which are selected for use for a given activity. 

1. Energy to run a cycle
2. Energy to run a car
3. Energy to cook food 
4. Energy to work on 


What are the characteristics of a good source of energy?


Energy can neither be created nor destroyed. Then why is there so much fuss about energy crisis?

What is meant by a source of energy?

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