CBSE Class 7 Social Science Geography Air Quiz 1

1. Which gas released in the atmosphere creates a greenhouse effect trapping the heat?

A Carbon dioxide B Oxygen C Nitrogen D All of these

2. Excess amount of CO₂ is responsible for

A global cooling B global warming C both (a) and (b) D none of these

3. What are the important objects for survival of plants and animals?

A Rainfall B Sun light C Oxygen D All of these

4. Which one of the following gases is present in the atmosphere in the highest amount?

A Oxygen B Carbon dioxide C Nitrogen D Lithium

5. Which gas is used by the green plants to make their food?

A Oxygen B Carbon dioxide C Nitrogen D None of these

6. Which is the important gas used by human beings for breathing?

A Nitrogen B Carbon dioxide C Oxygen D Sodium chloride

7. When the air is heated it becomes

A Lighter? B Heavier? C Colder? D None of these

8. What is the average height of the troposphere?

A 3 km B 6 km C 9 km D 13 km

9. As we go up in troposphere layer of the atmosphere the pressure

A increases B decreases C no change D all of these

10. Which one of the following gases protects us from harmful sun’s rays?

A Ozone B Nitrogen C Carbon dioxide D Oxygen