NCERT Class 8 Geography Chapter-3-Mineral and Power Resources Complete Notes Part-6

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Mineral and Power Resources

Tidal Energy

  • Energy from tides

  • Build dams at sea openings

  • Russia, France, Gulf of Kachchh

Image of Tidal Energy

Image of Tidal Energy

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Table shows Advantages and disadvantages of Tidal Energy



  • Non-polluting

  • Inexhaustible

  • Destroys wildlife habitat

  • Difficult to harness

Now tidal energy comes from the tides so you have the diagram here which shows how during the period of low tide you have energy that is harnessed. In India, it is Gulf of Kachchh mainly. Besides India you have France and Russia which harness tidal energy. Dams are built at the sea openings and it is again non-polluting but it destroys the nearby wildlife mainly the equity life and it’s difficult to harness. Next is Biogas energy.

Biogas Energy

  • Dead plant and animal material, animal dung and kitchen waste

  • Energy saved is energy generated

Image of Biogas Process Tank

Image of Biogas Process Tank

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Table shows Advantages and disadvantages of Biogas Energy



  • Low cost

  • Easy to operate

  • Makes use of bio waste

  • Causes greenhouse effect

Biogas is by the decay of animal and plant, you have the energy that is generated which again is used from kitchen waste, animal dung or from the dead plants. It’s low cost, it’s easy to operate but a major drawback is it causes greenhouse effect and that’s one of the primary disadvantages again. Energy saved is energy generated, so this is a major idea that we follow from the non-conventional energy sources now nuclear energy.

Nuclear Energy

  • Fission and Fusion reactions

  • Uranium & thorium

  • Greatest producer – USA & Europe

  • Uranium – Rajasthan & Jharkhand

  • Thorium – Monazite in Kerala

  • Kalpakkam in Tamil Nadu, Tarapur in Maharastra, Ranapratap Sagar near Kota in Rajasthan, Narora in UP, Kaiga in Karnataka

Image of Nuclear Energy Process

Image of Nuclear Energy Process

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Table shows Advantages and disadvantages of Nuclear Energy



  • Emits large amount of energy

  • Generates radioactive waste

  • Expensive

Nuclear energy can be either of two types - Fission and Fusion reactions.

Fission reaction is breaking up of the particle and the fusion reaction you have collision of two smaller particles to from bigger particles. So fusion reaction uses hydrogen which is I could say a part of renewable energy on the other hand fission reaction uses uranium or thorium.

Right now we have technology that harnesses through fission reaction as uranium and thorium which is non-renewable in nature. Now the greatest producer of uranium is USA and Europe. In India it’s found in Rajasthan and Jharkhand. Thorium in India is found in the Monazite in Kerala.

The major nuclear reactor in India Kalpakkam in Tamil Nadu, Tarapur in Maharashtra, Rana Pratap Sagar near Kota in Rajasthan, Narora in UP, Kaiga in Karnataka. These emits a large amount of energy but it generates a huge amount of radioactive waste which is harmful to the surrounding areas, to the wildlife in the nearby areas. Again as I mentioned previously the classification of nuclear energy is still debatable so with this we cover the major mineral resources and power resources.