define the following terms air
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AIR
Air is an invisible gaseous substance surrounding the Earth. It is a mixture of mainly nitrogen and oxygen.
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The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.Air is the general name for the mixture of gases that makes up the Earth's atmosphere. On the Earth, this gas is primarily nitrogen (78 percent), with oxygen (21 percent), water vapor (variable), argon (0.9 percent), carbon dioxide (0.04 percent), and many trace gases. ... There is no air in space...
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