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Question 1

Why is the atmosphere essential for life?

Answer

The atmosphere is essential for life because it is the mixture of gases forming a blanket surrounding the Earth. It maintains an appropriate climate for the sustenance of life by carrying out the following activities :

(i) Atmosphere consists of oxygen. Oxygen is required by living organisms for its survival.

(ii) Atmosphere filters out the harmful ultraviolet rays of the Sun.

(iii) Atmosphere also slows down the escape of heat from the surface of the Earth into outer space during night time.

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