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CBSE TEST PAPER SCIENCE & TECHNOLOGY

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Chapter 14 : Sources of Energy
1. What is that energy called, which is derived f rom the heat inside the earth? (1mark)
2. What do you mean by O. T.E? (1mark)
3. Write down the name of any one source of energy which is not derived directly or indirectly
from solar energy. (1mark)
4. Define a nuclear fusion reaction. Describe the conditions for the occurrence of a nuclear
fusion reaction. (2marks)
5. Give an ex ample of a nuclear fusion reaction. Describe one method for making such reactions
possible. (2marks)
6. Distinguish between renewable and a non-renewable source of energy. (2 marks)
7. What are the adv antages of bio-gas over th e traditional fuels? (2marks)
8. Explain the working of a wind mill. (2marks)
9. Wh y it is not possible to make use of solar cell to meet all our energy needs? State two
reasons to support your answer. (2marks)
10. (i)What is bio-gas? How can bio-gas be obtained?
(ii)What are the advantages of solar cells? (3 marks)
11. Draw a diagram and with the help o f a diagram, explain the construction and working of a box
type solar cooker. (3marks)
12. Write three advantages of nuclear energy. (3marks)
13. Name the original source of wind energy. Explain how, wind energy can be used to generate
electricity. State two advantages of using wind energy for generatin g electricity. Mention two
limitations of wind energy for generating electricity. (5 marks)
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