What is Atmosphere???
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The layer of air above the earth is called atmosphere. The air in our atmosphere extends upto 300 kilometres above the surface of Earth. The atmosphere contains a tremendous amount of air. Atmospheric pressure is the air pressure which is exerted by the weight of air present in the atmosphere.
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The atmosphere is the blanket of gases which surrounds Earth. The atmosphere keeps the climate on Earth moderate compared to that of other planets. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases.
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