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Question

Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of _______.
1. its escape into the outer stratosphere.
2. the photosynthesis by phytoplankton in the oceans.
3. the trapping of air in the polar ice caps.
Select the correct answer using the codes given below.
1 and 2
Only 2
2 and 3
Only 3

A

1 and 2

B

2 and 3

C

Only 2

D

Only 3

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Solution

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Phytoplankton are a very important part of the ocean foodchain. They make their own food by photosynthesis for which they utilize atmospheric carbon dioxide.

Trapping of carbon dioxide on polar ice caps is not known. Also, carbon dioxide does not escape into the stratosphere.

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Similar Questions

Q1

Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of _______.
1. its escape into the outer stratosphere.
2. the photosynthesis by phytoplankton in the oceans.
3. the trapping of air in the polar ice caps.
Select the correct answer using the codes given below.

View Solution

Q2

Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of
Which of the statements given above is/are correct?

1 and 2
2 only
2 and 3
3 only

View Solution

Q3

Which among these would increase carbon dioxide in the atmosphere ?
1. deforestation
2. burning of firewood
3. automobiles
Select the correct answer using the codes given below:

View Solution

Q4

Select the correct statements about greenhouse gases:

A. Carbon dioxide is the only gas in the atmosphere which causes global warming.
B. The greenhouse gases trap heat and do not allow heat to escape into outer space.
C. Water vapours do not contribute to the greenhouse effect.
D. The presence of excessive greenhouse gases in the atmosphere is responsible for global warming.

View Solution

Q5

Carbon dioxide is a greenhouse gas because it has an ability to trap heat in the atmosphere.

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