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


Fossil fuels Sun
1. Fossil fuel is a non-renewable source of energy. 1. Sun is a renewable source of energy.
2. Combustion of fossil fuels causes lot of air-pollution. 2. Solar energy is pollution free.
3. Fossil fuels can be easily tapped. 3. Solar energy is difficult to tap. 





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What are the limitations of extracting energy from:
(a) the wind   
(b) waves
(c) tides?


Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
  • geothermal energy
  • wind energy
  • nuclear energy
  • bio-mass.

Which of the following is not an example of a bio-mass energy source?

  • wood
  • gobar-gas
  • nuclear energy

  • coal


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


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