Sources of Energy Class 10 Notes

What is Energy?

Energy is defined as an ability to do work. Energy is a conserved quantity that exists in several forms including heat, light, electrical, potential energy, kinetic energy, and other forms of energy.

According to the law of conservation of energy – energy can neither be created nor destroyed but it can be converted into a different usable form. The SI unit of energy is the joule.

Sources of Energy

There are two main sources of energy and it includes:

Renewable Energy —The energy which can be renewed or replaced over and over again is termed as the Renewable energy. This energy can never be depleted. Renewable energy is derived from natural processes such as sun, wind, water, biofuels, etc.

Non Renewable energy —The energy which cannot be renewed or replaced is termed as the Non-renewable energy or alternative energy. This energy is derived from fossil fuels including Coal, Oil and other gases.

There are different sources of energy, which are widely used to produce electricity. The produced electricity is used by the entire world’s population in their day to day activities. The different source of energy includes:

  • Solar energy.
  • Wave Energy.
  • Wind energy.
  • Fossil Fuels.
  • Tidal Energy.
  • Biomass Energy.
  • Nuclear Power.
  • Hydrogen Energy.
  • Geothermal Energy.
  • Hydroelectric Energy.

Few Important Questions

  • What is Biomass?
  • What is geothermal energy?
  • List out the Different Sources of Energy?
  • List out the advantages and disadvantages of fossil fuels?
  • Difference Between renewable and non-renewable energy with examples.

Learn more about Energy and its sources from the topics given below:

Practise This Question

Which of the following does not use asexual mode of reproduction?