Question

Match the following gases with the percentage composition in which they are found in the atmosphere.

• A. 21 %
• B. 78 %
• C. 0.04 %

Answer 1

The atmosphere of earth contains gases like nitrogen, oxygen, carbon dioxide, hydrogen, helium etc.

Nitrogen constitutes 78% of the atmosphere.

Oxygen and carbon dioxide make 21% and 0.04% of the atmosphere respectively. Oxygen and carbon dioxide are important gases for plant and animal life on earth.