discuss the composition of atmosphere
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Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one percent of the atmosphere.
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The atmosphere is composed of gases, water vapour and dust particles. The given table specifies the constituent of atmosphere with their volume.
*Nitrogen and Oxygen gases together constitute 99% of the atmosphere.
*Other gases include are Carbon dioxide, Neon, Helium, Krypto, Xenon and Hydrogen.
*The proportion of gases changes in the higher layers of the atmosphere in such a way that oxygen will be almost in negligible quantity at the height of 120 km.
*carbon dioxide and water vapour are found only up to 90 km from the surface of the earth.
*Carbon dioxide absorbs a part of terrestrial radiation and reflects back some part of it towards the earth’s surface. It is largely responsible for the green house effect.
*Ozone is another important component of the atmosphere which absorbs the ultra-violet rays radiating from the sun and prevents them from reaching the surface of the earth.
*Nitrogen and Oxygen gases together constitute 99% of the atmosphere.
*Other gases include are Carbon dioxide, Neon, Helium, Krypto, Xenon and Hydrogen.
*The proportion of gases changes in the higher layers of the atmosphere in such a way that oxygen will be almost in negligible quantity at the height of 120 km.
*carbon dioxide and water vapour are found only up to 90 km from the surface of the earth.
*Carbon dioxide absorbs a part of terrestrial radiation and reflects back some part of it towards the earth’s surface. It is largely responsible for the green house effect.
*Ozone is another important component of the atmosphere which absorbs the ultra-violet rays radiating from the sun and prevents them from reaching the surface of the earth.
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