9. What is a primary benefit of the \"cold trap\" at the top of Earth\'s troposp

Question

9. What is a primary benefit of the "cold trap" at the top of Earth's troposphere?

Select one:

a. It makes water vapor condense out of the atmosphere, preventing it from rising up into the upper atmosphere.

b. It mitigates the effects of global warming by trapping excess heat.

c. It creates the jet stream, which drives many of the Earth's weather patterns.

d. It maintains the ozone layer, which forms in cold conditions.

13.

Approximately when will the Sun run out of hydrogen to fuse in its core?

Select one:

a. In about 3.5 billion years

b. In about 6 billion years

c. In about 2 billion years

d. In about 1 billion years

e. In about 12 billion years

14.How large will the Sun be as a red giant?

Select one:

A. About 1/10 AU radius (1/4 of Mercury's orbit)

B. About 1.5 AU radius (out to Mars's orbit)

C. About 1/2 AU radius (beyond Mercury's orbit)

D. About 1 AU radius (out to the Earth's orbit)

15.How will the Sun appear as a red giant, compared to today?

Select one:

A. hotter and brighter

B. cooler and dimmer

C. hotter and dimmer

D. the same temperature and brightness

E. cooler and brighter

Explanation / Answer

9) a. It makes water vapor condense out of the atmosphere, preventing it from rising up into the upper atmosphere.

13) b. In about 6 billion years.

14) B. About 1.5 AU radius (out to Mars's orbit)

When sun becomes red giant its radius to swell from roughly 1 AU to perhaps 2 AU or so. It shows that Mercury and Venus will surely be engulfed by the Sun, and the Earth and Mars may be engulfed.

15) B. cooler and dimmer

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