Main Points

Sources of Energy

  • Energy sources which are being used since a considerable time are called conventional sources of energy.
  • Coal and petroleum are called fossil fuels because they were formed from fossils.
  • Burning of fossil fuels results in air pollution.
  • Energy sources which cannot be replenished in foreseeable future are called non-renewable sources of energy.
  • Energy sources which can be replenished in foreseeable future are called renewable sources of energy.
  • In a hydropower plant, kinetic energy of running water is converted into electrical energy.
  • Cow dung and other farm waste can be utilized to produce biogas; which is popularly known as ‘Gobar Gas’.
  • Now-a-days, wind energy is being used for power generation.
  • Energy sources which have come into use in recent times are called non-conventional sources of energy.
  • Tidal energy, wave energy and ocean thermal energy are examples of energy from ocean.
  • Nuclear energy is based on nuclear fission.

These main points are highly helpful for last minute preparation for examination. You can glance through them while going for examination. You can view them in the school bus, in car, in elevator, etc.