CBSE Class 11 Geography Chapter 8 Composition and Structure of Atmosphere Notes
Atmosphere is the huge blanket of air that surrounds the earth and provides life supporting conditions on the earth.
The main constituents of air are nitrogen, oxygen, carbon dioxide, argon, helium, ozone, hydrogen, water vapour and dust particles.
Nitrogen constitutes the largest proportion of the atmosphere. It accounts for 78.03% of the total volume of gases.
Oxygen is the life giver gas of the atmosphere. It accounts for 20.99% of total volume of gases in air. Carbon dioxide is the heaviest gas of the atmosphere. It forms about 0.036% volume . Please refer Class 11 Geography Chapter 8 Composition and Structure of Atmosphere Notes for more information.
CBSE Revision Notes 