Q1 of 47 Page 141

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The lowest layer of the atmosphere is ________


Troposphere is the lowest layer of the atmosphere which extends up to 8 kilometres at the pole and up to 18 kilometres at the equator. Almost all the weather phenomenon take place in this layer hence we experience changes in weather conditions.

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1 A

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________ is the most important gas for the survival of living organisms.


 1

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________ reflects radio waves.


 1 D

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The average global surface temperature is ________


 1

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Temperature ________ from the equator to pole.