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 atmosphere.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The radiation of infrared rays of the sun keeps the earth's surface warm even at night due to the greenhouse effect of the atmosphere. Heavy gases likely $C O_{2}$ present in the earth's atmosphere reflect infra-red radiation back towards the earth's surface. Due to which earth's atmosphere becomes richer in infrared radiation. If the atmosphere is absent then earth temperature falls off.

So, Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Hence, the correct option is $(A)$

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Now, choose the correct option.

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