Assignment - Sources Of Energy, Class 10, Science PDF Download

Very Short Answer Type Questions

1. Name two renewable and two nonrenewable sources of energy.

2. Name two conventional and two nonconventional sources of energy.

3. What is the ultimate source of the energy of fossil fuels?

4. Name four fuels that we get from fossil fuels.

5. Among fossil fuels, which is the least polluting?

6. What happens when coal burns incompletely?

7. What is a turbine?

8. What is hydroelectricity?Assignment

9. Mention two ways by which water can be used to produce hydroelectricity.

10. What kind of energy does wind possess?

11. In the context of energy production, what is biomass?

12. What is the main constituent of biogas?

13. Which will cause the least amount of smoke when burnt-wood, cattle-dung cakes or biogas?

14. Why is solar energy considered renewable?

15. If 100 joules of solar energy is received by the upper atmosphere, how much of it reaches the earth's surface?

16. What is a solar heating device?

17. In a box-type solar cooker what is the range of temperature that can be achieved in two to three hours?

18. Why is the inside surface of a box-type solar cooker blackened?

19. A solar cell transforms energy of one form into another form. What are these two forms of energy?

20. What is a solar panel?

21. Can a solar panel be used directly to power the TV set in your home?

22. What is geothermal energy?

23. What is nuclear fission?

24. What is a chain reaction?

25. What is nuclear fusion?

26. What is a nuclear reactor?

27. Name the process by which the sun produces its energy.

28. Which process is carried out at a higher temperature: nuclear fusion or nuclear fission?

29. Give an example of how you can stop the wastage of energy.

Short Answer Type Questions

1. Why are fossil fuels considered nonrenewable?

2. Can the excessive use of coal have a deteriorating effect on structures like the Taj Mahal? If yes, in what way?

3. How is charcoal produced?

4. Why is charcoal a better fuel than wood?

5. (a) Name the four gases commonly present in biogas. (b) List two advantages of using biogas over fossil fuels.

6. When we harness wind energy, we harness solar energy indirectly. Explain

7. How is electricity produced from wind energy? What are wind farms?

8. What are the advantages and limitations of wind energy?

9. Give two reasons why hydroelectricity is preferable to electricity from a coal-based plant.

10. Where are tidal power plants usually located? What are the limitations of tidal power?

11. Draw a diagram to show the basic design of a box-type solar cooker.

12. Explain the role of the glass top in a box type solar cooker.

13. What are the limitations of solar heating devices?

14. What are the advantages of solar energy?

15. Describe three uses of a solar panel.

16. What is the difficulty in the large-scale use of solar cells in electricity production?

17. How can electricity be generated from waves?

18. How are the wastes produced in nuclear power plants different from those produced at other power plants? What happens to the waste?

19. Compare and contrast fossil fuels and the Sun as direct sources of energy.

20. Compare and contrast bio-mass and hydro electricity as sources of energy.

21. What are the limitations of extracting energy from -

(a) the wind? (b) waves? (c) tides?

22. On what basis would you classify energy sources as

(a) renewable and non-renewable?

(b) exhaustible and inexhaustible?

Are the options given in (a) and (b) the same?

23. What are the qualities of an ideal source of energy?

24. What are the advantages and disadvantages of using a solar cooker ? Are there places where solar cookers would have limited utility?

25. What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?

26. What is a good source of energy?

27. What is a good fuel?

28. If you could use any source of energy for heating your food, which one would you use and why?

29. What are the disadvantages of fossil fuels?

30. Why are we looking at alternate sources of energy?

31. How has the traditional use of wind and water energy been modified for our convenience?

32. What kind of mirror - concave, convex or plain - would be best suited for use in a solar cooker? Why?

33. What are the limitations of the energy that can be obtamed from the oceans?

34. What is geothermal energy?

35. What are the advantages of nuclear energy?

36. Can any source of energy be pollution-free? Why or why not?

37. Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not?

38. Name two renewable or non-conventional sources of energy

39. Name two non-renewable or non-conventional sources of energy.

40. How is charcoal obtained from wod?

41. Name the component of sunlight carrying maximum heat.

42. Name the device which directly converts solar energy into electric energy.

43. What is the range of temperature attained inside a box type solar cooker when placed in the sun for two to three hours?

44. What is the main basic cause for winds to blow?

45. What is a wind form? What is the minimum wind velocity requiredc to obtained useful energy with a wind mill?

46. Name the factor which enables the ocean to act as a store house of energy.

47. Name two main combustible components of biogas.

48. What is a fossil fuel? Give two examples of fossil fuels.

49. What is a nuclear fission and Nuclear fussion?

50. The mass number of three elements A, B and C are 2, 180 and 235. Which one of them is suitable to make a hydrogen bomb?

51. Wind mill in used to produce electricity. Write the sequence of energy conversion in a wind mill.

52. Define "electron-volt".

53. What is biogas? How can biogas be obtained? Why is the use of biogas obtained from cow-dung advised in preference to burning of cow-dung cokes?

54. Why is the use of wood as a fuel not advised although forests can be replenished?

55. "Why is there a need to harness non-conventional sources of energy?"

56. Charcoal is a better fuel than wood. Explain why?

57. What is the role of a plane mirror and a glass sheet in a solar cooker?

58. Why is energy of water flowing in a river considered to be an indirect form of solar energy?

59. Why are fossil fuels known as a non-renewable sources of energy?

60. Why are many thermal power plants set up near coal or oil fields?

Long Answer Type Questions

1. What is the difference between renewable and nonrenewable sources of energy?

2. What are the characteristics of a good energy source?

3. What are the problems caused by burning fossil fuels?

4. Describe the construction and working of a biogas plant.

5. Why is hydro energy considered an indirect source of solar energy? Explain how hydro energy can be converted into electrical energy. State two advantages of hydro energy.

6. What causes wind to blow? Name a part of India where wind energy is commercially harnessed. Compare wind power and the power of flowing water for generating electricity. What are the hindrances in developing them?

7. Discuss the advantages and disadvantages of generating electricity from the wind.

8. Describe a box-type solar cooker, mentioning how the loss of heat is reduced in it.

9. Briefly discuss three principles based on which electricity can be generated from the ocean.

10. Describe how the difference in temperatures at different depths of the ocean can be utilized for generating electricity.

11. What are the problems created by the increased demand of energy? How can we solve them?