What is air? Write its Composition ?
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The atmosphere of Earth is the layer of gases, commonly known as air, retained by Earth's gravity, surrounding the planet Earth and forming its planetary atmosphere.
By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
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the atmosphere of the Earth is the layer of gases are known as air.
its composition are nitrogen 78%, oxygen 21% , 0.93 argon,0.04 carbon dioxide and other gases are small amount.
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