Question

1. Which of the following is  not considered a mechanism of natural climate change? A movement of...

1. Which of the following is  not considered a mechanism of natural climate change?

A

movement of continents via plate tectonics.

B

the burning of fossil fuels.

C

solar variability.

D

changes in Earth-Sun relationships.

E

volcanic eruptions.

2.Which of the following is  not an indicator of current climatic warming?

A

increased tropospheric, land, and ocean surface temperatures

B

decreases in atmospheric water vapor

C

rising sea levels

D

melting glacial ice and sea ice

E

decreases in sea ice extent

3.The residence time of carbon dioxide (CO 2)  is

A

50 to 200 years.

B

approximately 90 days.

C

12 years.

D

45 days.

E

50,000 years.

0 0
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Answer #1

1.The answer is B=the burning of fossil fuels
this is not natural cause and is caused by the humans

2.The answer is B=decrease in atmospheric water vapour
As warming occurs, more amount of water is being evaporated and is held as water vapor.

3.The answer is A=50 to 200 yars

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