Q. 1. Why there is a need for energy?
Q. 2. Give some sources of energy?
Q. 3. Give the main categories of source of energy?
Q. 4. Which of the following are renewable and which are non-renewable sources of energy:
Coal, wind, tides, sun, petrol, bio-mass, cng, hydro-energy
Q. 5. What is solar energy?
Q. 6. Which part of the sun’s energy is responsible for drying clothes?
Q. 7. Which component of the sun’s energy responsinle for skin cancer?
Q. 8. What are semi-conductors?
Q. 9. Define ocean thermal energy?
Q. 10. define geothermal energy?
Q. 11. Define bio-mass? Give its three examples.
Q. 12. Define anaerobic degradation?
Q. 13. Explain why a reflector is used in a solar cooker?
Q. 14. What causes a wind to blow?
Q. 15. Define solar constant?
Q. 16. Explain how the high temperature is maintained inside a solar cooker?
Q. 17. Distinguish between renewable and non-renewable sources of energy?
Q. 18. What is the use of black painted surface in solar heating device?
Q. 19. Charcoal is better fuel than wood and coal, still its use is discouraged. Why?
Q. 20. Why is bio-gas a better fuel animal dung-cakes?
Q. 21. Why is sun called the ultimate source of fossible fuels?
Q. 22. Write a short note on ‘green house effect’?
Q. 23. What are the advantages of nuclear energy?
Q. 24. Why are we looking for alternate source of energy?
Q. 25. Define bio-degradable wastes?
Q. 26. What protects us from the harmful effect of ultra violent rays of the sun?
Q. 27. Define food wed?
Q. 28. Define producers and consumers and give their examples?
Q. 29. Why do we say that flow of energy in the ecosystem is undirectional?
Q. 30. What will happen if we kill all organisms of one tropic level of food chain?
Q. 31. What is ganga action plan?
Q. 32. Define sustainable development?
Q. 33. What is the main aim of the conservation of forests?
Q. 34. Who are stakeholders?
Q. 35. What do you mean by water harvesting?
Q. 36. What do you mean by chipko movement?
Q. 37. Why do you think their should be eqitable distribution of resources?
