1. Natural gas can be used for heating and cooking food as it is a clean source of energy. It has high calorific value also It does not produce a large amount of smoke on burning. It is easy to use and easy to transport.

    Natural gas can be used for heating and cooking food as it is a clean source of energy. It has high calorific value also It does not produce a large amount of smoke on burning. It is easy to use and easy to transport.

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  2. A fuel is considered good or desirable when it has a low ignition temperature and generates a significant amount of heat. It reflects it high in its calorific value. Ideal fuels should be easy to store, leaving behind ash after they are burned and quickly combust. They are inexpensive , readily avaiRead more

    A fuel is considered good or desirable when it has a low ignition temperature and generates a significant amount of heat. It reflects it high in its calorific value. Ideal fuels should be easy to store, leaving behind ash after they are burned and quickly combust. They are inexpensive , readily available and do not emit any harmful smell. While burning can be easily carried and can be regulated.

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  3. The characteristics of good source of energy are (a) It should have high calorific value. (b) It should be easy to handle. (c) It is should be easily available. (d) It is easy to store. (e) It should be cheaper. (f)It should produce less amount of smoke.

    The characteristics of good source of energy are
    (a) It should have high calorific value.
    (b) It should be easy to handle.
    (c) It is should be easily available.
    (d) It is easy to store.
    (e) It should be cheaper.
    (f)It should produce less amount of smoke.

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  4. The role of a decomposer in the ecosystem are: 1. They act as a cleansing agent of the environment by decomposing the dead plants and animals. 2. They help in recycling the nutrients. 3. They provide space for new being in the biosphere by decomposing the dead. 4. They help in putting back the varioRead more

    The role of a decomposer in the ecosystem are:
    1. They act as a cleansing agent of the environment by decomposing the dead plants
    and animals.
    2. They help in recycling the nutrients.
    3. They provide space for new being in the biosphere by decomposing the dead.
    4. They help in putting back the various elements into water, soil and air for the
    reuse of producers like crop plants.

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  5. The various links or steps in a food chain at which the transfer of food and energy takes place are called trophic levels. The producers form the first trophic level as they manufacture food. The primary consumers form the second trophic level, the secondary consumers form the third, and the tertiarRead more

    The various links or steps in a food chain at which the transfer of food and energy takes place are called trophic levels.
    The producers form the first trophic level as they manufacture food. The primary consumers form the second trophic level, the secondary consumers form the third, and the tertiary consumers form the fourth trophic level.

    Grass is the producer which is eaten by the grasshopper known as primary consumer. Then the grasshopper is eaten by shrew, secondary consumer and lastly shrew eaten up by owl, tertiary consumer.

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