Class 10 Physics Sources of Energy Coal, Petroleum, Natural Gas

Coal, Petroleum, Natural Gas


  • In earlier times, coal was used to heat homes, industrial application is industries and factories, power locomotives
  • Coal is very commonly many industrial applications to produce heat energy and locomotion.
  • Coal is used to operate furnaces for melting metal ores.
  • They are used to run internal combustion engines.


  • Petroleum is again a carbon-rich compound formed by the decomposition of diatoms.
  • Petroleum products are predominantly used to run automobiles.

Natural Gas

  • It is made of methane (carbon) and is lighter than air.
  • It is highly inflammable.
  • It is used extensively as cooking gas.

Disadvantages of using Fossil fuels

  • Air pollution: Burning of fossil fuels generate a lot of chemicals like oxides of sulfur, carbon and nitrogen and release it into the atmosphere.
  • Acid Rains : These chemicals fall back on earth as acid rain. They are very detrimental to natural and built environments.
  • Greenhouse Effect and Global warming : Burning of fossil fuels release gases like carbon-di-oxide which trap the heat in the atmosphere without releasing it and causing temperatures to increase steadily.

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