1. The advantages of nuclear energy are that : It produces a large amount of useful energy from a very small amount of a nuclear fuel (like uranium-235). Once the nuclear fuel (like uranium-235) is loaded into the reactor, the nuclear power plant can go on producing electricity for two to three years aRead more

    The advantages of nuclear energy are that :

    1. It produces a large amount of useful energy from a very small amount of a nuclear fuel (like uranium-235).
    2. Once the nuclear fuel (like uranium-235) is loaded into the reactor, the nuclear power plant can go on producing electricity for two to three years at a stretch. There is no need for putting in nuclear fuel again and again.
    3. It does not produce gases like carbon dioxide which contributes to greenhouse effect or sulphur dioxide which causes acid rain.
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  2. Energy stored as heat in certain regions of the earth (called hot spots) is called geothermal energy. Hot spots are the locations below earth’s crust where upward moving magma gets collected due to geological changes. When underground water comes in contact with the hot spots, steam is generated. ThRead more

    Energy stored as heat in certain regions of the earth (called hot spots) is called geothermal energy. Hot spots are the locations below earth’s crust where upward moving magma gets collected due to geological changes. When underground water comes in contact with the hot spots, steam is generated. This steam is utilised to generate electricity using pipes and turbines. Sometimes hot water from the hot spot finds outlet at the surface. Such outlets are called hot springs.

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  3. The energy from the oceans can be obtained mainly in three forms. These are (i) tidal energy (ii) wave energy and (iii) ocean thermal energy There are very few sites around the world which are suitable for building tidal dams. The movement of ocean waves is associated with kinetic energy. Such sitesRead more

    The energy from the oceans can be obtained mainly in three forms. These are
    (i) tidal energy
    (ii) wave energy and
    (iii) ocean thermal energy

    There are very few sites around the world which are suitable for building tidal dams.

    The movement of ocean waves is associated with kinetic energy. Such sites in the world are limited where the waves strike the shore lines with sufficient power.

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  4. A concave mirror would be best suited in a solar cooker because it focuses the sunlight in a very small area of the solar cooker and a high temperature is produced in it which is sufficient to cook the food.

    A concave mirror would be best suited in a solar cooker because it focuses the sunlight in a very small area of the solar cooker and a high temperature is produced in it which is sufficient to cook the food.

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  5. The small numbers of surviving tigers are a cause of worry from the point of view of genetics because in tigers there are negligible genetic variations. Due to this they are not well adapted. The rapid environmental changes cannot be favouable for them. If these changes are not controlled, tigers woRead more

    The small numbers of surviving tigers are a cause of worry from the point of view of genetics because in tigers there are negligible genetic variations. Due to this they are not well adapted. The rapid environmental changes cannot be favouable for them. If these changes are not controlled, tigers would be wiped out.

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