class10 important questions-sources of energy

IMPORTANT QUESTIONS:


      

1. Why is there a need to harness non-conventional sources of energy? Give two main reasons.
2. Write two different ways of harnessing energy from ocean.
3. What steps would you suggest to minimise environmental pollution caused by burning of fossil fuels?
4. What is the role of a plane mirror and a glass sheet in a solar cooker?
5. Mention three advantages of a solar cell?
6. What is biomass? What can be done to obtain bio-energy using biomass?
7. What are the limitations in obtaining energy from wind?
8. Which is the process used to harness nuclear energy these days? Explain it briefly.
9. How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?
10. Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one nonconventional source of energy.
11. Why is there a need for harnessing non-conventional sources of energy? How can energy be harnessed from the sea in different ways?
12. What are the environmental consequences of using fossil fuels? Suggest the steps to minimise the pollution caused by various sources of energy including non-conventional sources of energy.
13. Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
14. What is biomass? Explain the principle and working of a biogas plant using a labelled schematic diagram.