The atmosphere of the earth is composed of gases like nitrogen (78%), oxygen (21%), carbon dioxide, helium and argon (less than 1%). Atmosphere plays a major role in making earth a habitable planet as-
The atmosphere receives heat from the sun by solar radiation and loses heat by earth's radiation. In this way, a balance is maintained.
The earth's atmos[here is made up of life-supporting gases like nitrogen, oxygen and carbon dioxide.
Ozone present in the earth's atmosphere absorbs harmful ultraviolet rays of the sun.
The atmosphere also prevents loss of heat from the earth's surface and helps to keep earth warm.