1. It is an element of atmosphere

2. Which gas is opaque to the outgoing terrestrial radiation?

3. The uppermost layer of the atmosphere is

4. Which one of the following gases constitutes the major portion of the atmosphere?

5. Which of the following gases absorbs ultraviolet rays?

6. Excess carbon dioxide in the atmosphere due to pollution will cause

7. Which zone separates the troposphere from the stratosphere?

8. The increase in the volume of carbon dioxide for the past few decades is mainly due to

9. What envelopes the earth all round?

10. The radiations that heat earth's atmosphere, comes from the