Composition and Structure of Atmosphere — Chapter Summary

The atmosphere is a mixture

The atmosphere is a mixture of different gases that surrounds the earth. It contains gases essential for life, especially oxygen for animals and carbo

The atmosphere is made up

The atmosphere is made up of gases, water vapour, and dust particles. The proportions change with height, and oxygen becomes almost negligible at 120

Carbon dioxide is transparent to incoming

Carbon dioxide is transparent to incoming solar radiation but opaque to outgoing terrestrial radiation. It is responsible for the greenhouse effect, a

Water vapour is a variable gas

Water vapour is a variable gas that decreases with altitude and from the equator towards the poles. It may form up to four per cent of air volume in w

Dust particles include sea salts

Dust particles include sea salts, fine soil, smoke-soot, ash, pollen, dust, and disintegrated meteor particles. They are concentrated in the lower atm