Question

Which atmospheric gases play a major role in maintaining the Earth as a life supporting planet?

1. Oxygen
2. nitrogen
3. carbon dioxide

• A. All of these
• B. 3 only
• C. 1, 3
• D. 2, 3

Answer 1

Answer:

A. All of these

Blanket of the earth

• The atmosphere is the blanket of air surrounding the earth. It is the atmospheric gases such as oxygen, nitrogen and carbon dioxide which play a major role in maintaining the earth as a life supporting planet.

• Plants play a major role in maintaining the balance of life supporting gases in required proportion through the process of photosynthesis.

• Atmosphere extends to about 10000 kilometres from the earth's surface. But about 97 percentage of the atmospheric air remains within 29 kilometres from the earth's surface.