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'The earth without its atmosphere would ...

'The earth without its atmosphere would be inhospitably cold'. Why?

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Heat radiated out by earth is reflected back by the atmosphere. In the absence at night all heat would escape from earth.s surface thereby surface would be inhospitality cold. Also atmosphere helps in maintaining the temperature through convection current.
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Knowledge Check

  • Assertion : If earth did not have atmosphere, its average surface temperature would be lower than what it is now Reason : Green house effect of the atmosphere would be absent, if earth did not have atomosphere.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

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