Question

Explain the composition of the atmosphere.

Answer 1

1. Atmosphere is a sea of gases surrounding the Earth.
2. There are many gases in the atmosphere, but oxygen (about 21% in volume) and nitrogen (about 78% in volume) dominate.
3. Other gases are present in very small percentages; these include argon, neon, carbon dioxide (about 0.03% by volume), methane, ammonia, ozone etc.
4. Water vapour accounts for about 0.4% of volume in the atmosphere.
5. Apart from these gases, the atmosphere also has fine dust particles; these are called particulates.