Chapter 8 Composition and Structure of Atmosphere

1. consider the following statement .

1. Statement : (A) In recent decades, the amount of carbon dioxide in the atmosphere has increased.
2. Reason : (R)  Carbon dioxide levels are growing as a result of the use of fossil fuels.

Select the correct answer using the code given below.

2. Take a look at the following assertions about water vapour:

1. As you rise in altitude, the amount of water vapour in the atmosphere increases.
2. Water vapour levels rise as you travel from the equator to the poles.
3. The earth’s emitted heat is preserved by water vapour.

Which of the following assertions is/are correct?

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

4. Take into consideration the following:

1. Only subtropical climates have a higher quantity of dust particles.
2. Dust particles are mostly concentrated in the atmosphere’s lower levels.
3. Pollen is a very fine powder that trees make.

Which of the following assertions is/are correct?

5. Take a look at the following statement.

1. Although nitrogen is the most abundant gas in the air, humans do not inhale it.
2. Plants require nitrogen for existence and obtain it from the air.

Select the correct response.

6. Atmospheric layer important for human beings is:

7. Consider the following statement: “Assemble the atmosphere layers from the earth’s surface (bottom) to the top.”

Select the correct response.

8. Take a look at the following statement about a waterfall.

1. The Troposphere layer is where almost all weather phenomena occur.
2. Stratosphere is a good place to fly planes.
3. In the Mesosphere, there is a third layer of ozone gas.

Select the correct response.

9. Sea salt, pollen, ash, smoke soot, fine soil here are associated with:

10. consider the following statement .

1. Statement : (A) At the equator, the troposphere is the thickest.
2. Reason : (R) Strong convectional currents convey heat to vast heights.

Choose the correct answer

11. Thermosphere is an atmospheric layer that aids in:

12. At the top of the atmosphere, the amount of oxygen gas is negligible:

13. Think about the following sentence.

1. Temperature refers to the degree of hotness or coolness in the air.
2. From the equator to the poles, the amount of insolation increases.

Select the correct response.

14. consider the following statement .

1. Statement : (A) Cities have substantially greater temperatures than villages.
2. Reason : (R)  During the day, the concrete and metals in structures, as well as the asphalt on roadways, heat up.

Choose the correct answer

15. consider the following statement .

1. Statement : (A) Cities have substantially greater temperatures than villages.
2. Reason : (R)  During the day, the concrete and metals in structures, as well as the asphalt on roadways, heat up.

Choose the correct answer

16. Which of the following gases is transparent to solar radiation but opaque to terrestrial radiation?

17. consider the following statement .

1. Statement : (A) The air above us (humans) exerts a tremendous pull on our bodies.
2. Reason : (R)  The atmosphere is the thin layer of air that surrounds the earth.

Choose the correct answer