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The atmosphere of the earth is heated by...

The atmosphere of the earth is heated by radiations which are mainly

A

radiated by the sun

B

re-radiated by land

C

re-radiated by water

D

re-radiated by land and water

Text Solution

Verified by Experts

The correct Answer is:
D
When solar radiations fall on earth, some are absorbed by the land but mahority of these are reflected back or re-radiated by land and water bodies. These re-radiated or reflected solar radiation, heat up the atmosphere. This results in convection currents.
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Earth Atmosphere

75% of the Solar Energy reaching Earth is absorbed by earth's surface which increases its temperature.The reat of heat rediates back to the atmosphere. Some of the heat is trapped by gases such as CO_(2), CH_(4), O_(3), CFCS present in atmosphere. They add to the heating of atmosphere which causes 'Global Warming'. Answer the following questions on the basis of above paragraph : (i)What is Green House effect ? (ii)What can we do to reduce the rate of Global Warming ?

Knowledge Check

  • The atmosphere of the earth is heated by resiations which are mainly

    A
    radiated by the sum
    B
    re-radiated by land
    C
    re-radiated by water
    D
    re-radiated by land and water

  • The atmosphere is mainly heated by the :

    A
    Short wave solar radiation
    B
    Reflected solar radiation
    C
    Long wave terrestrial radiation
    D
    Scattered solar radiation

  • The warming of earth atmosphere due to the trapping of heat radiation is known as

    A
    distillation
    B
    photo emission
    C
    red house effect
    D
    greenhouse effect

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    Assertion : infrared radiation plays an important role in maintaining the average temperature of earth Reason : Infrared radiations are sometimes referred to as heat waves.

    If there were no atmosphere around the earth, the temperature of the earth will

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    Assertion: CO_(2) present in the atmosphere absorbs heat radiated from heat radiated from earth in the form of IR radiations. Reason: CO_(2) is a pollutant.

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