Group A
1. What is energy? Write down its SI unit.
Answer: Energy is the ability of a body to do work. Its SI unit is Joule (J).
2. What ar evarious types of energy sources? Name them.
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3. What is renewable source of energy?
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4. Given any two examples of renewable source of energy.
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5. What is non-renewable source of energy?
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6. How much part of the solar energy reaches the earth?
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7. What is nuclear reaction? Give one example of nuclear reaction.
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8. What are two conditions required for nuclear fusion reaction that takes place in the sun?
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9. What is fossil fuel energy? Give reason.
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10. What is mineral oil?
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11. What is hydroelectricity? What is the estimated hydroelectric potential of Nepal?
Answer: The electricitiy obtained from the flowing water is called hydroelectricity. The estimated hydroelecric potential of Nepal is 84000 MW.
12. Name any two alternative sources of energy.
Answer: Any two alternative sources of energy are Solar Wind and Hydroelectricity.
13. What is biomass?
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14. Define biomass energy.
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15. What is biofuel?
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16. What is biogas?
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17. What is nuclear fission reaction?
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18. What is tidal energy?
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19. What is wind energy?
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20. What is geothermal energy?
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21. What is energy crisis?
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22. List any two causes of energy crisis.
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23. Write any two natural phenomena from which geothermal energy can be obtained?
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24. Name any two main sources of energy used in the world.
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Group B
1. The sun is considered as an ultimate source of energy. Justify this statement.
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2. What is thermonuclear fusion reaction? Write with chemical reaction.
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3. The use of hydroelectrictiy should be increased rather than that of mineral oil. Justify this statement.
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4. What do you mean by alternative sources of energy? Write with example.
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5. Write two differences between renewable sources of energy and non-renewable sources of energy.
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6. Write two differences between nuclear fusion reaction and nuclear fission reaction.
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7. Write two differences between fossil fuel energy and biofuel.
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8. The demand of fossil fuel is increasing day by day in the present day world. Why?
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9. State any two causes of energy crisis.
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10. The higher priority has been given for the use of biogas energy in Nepal. Give reasons.
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11. Justify with two reasons that the hydroelectricity is the best alternative source of energy in the context of Nepal.
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12. In the present world, the use of hydroelectricity is increasing. Write any two reasons.
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13. The use of alternative source of energy helps to control the energ crisis, how?
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14. “Nepal has high potentiality of producing hydroelectricity.” Give any two reasons to justify this statement.
15. Write two causes that Nepal Government has given higher priority for the production of hydroelectricity.
Group C
1. The generation and use of hydroelectricity is spreading throughout the world. Justify this statement giving any three reasons.
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2. The development and use of alternative energy sources is very necessary in present day worl. Explain this statement.
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3. Biomass energy is the best source of alternative energy in the context of Nepal. Examplain this statement with reason.
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4. How is nuclear energy produced? Describe in brief.
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5. Write any three ways to solve the situation of energy crisis in the context of our country.
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6. Why should energy be conserved? Mention any three steps you would take at home to conserve energy.
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7. In future, the hydroelectricity will be main alternative source of energy for Nepal. Justify it with three reasons.
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8. How is the enormous amount of energy produced in the sun? Describe it with chemical equation.
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Group D
1. How is energy produced from nuclear fission reaction? Describe in brief.
2. Explain in brief about present status of energy use in the world and its conservation.
3. All the sources of energy present on the earth are the outomes of solar energy. Justify this statement with examples.
4. Government of Nepal encourages the farmers to establish bio-gas plant. Write any two scientific reasons of it. In the context of Nepal, it is better to use energy like solar power. Justify your answer with two reasons.
5. Write down the causes of extreme use of petrol, athough it is a non-renewable source of energy. Giv the equation of process of formation of helium atom from hydrogen atoms in the sun.
6. Justify giving four reasons that the use of hdropower should be increased than that of coal and mineral oil for energy.
7. Why is the development and use of alternative energy sources necessary in today’s world? Explain.
8. How can we generate electricity from geothermal energy? Explain with figure.
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