which of the following statements about earths atmosphere is true?

Question

a. earths atmosphere contains 78 percent water vapor which is essential to life

b. earhts atmoshpere contains 21 percent oxygen

c. earths atmosphere contains carbon dioxide which all life forms require

d. earths atmosphere allows radiation from the sun to pass through it and warm earths surface

Is it A.?

Answer 1

Thanks for nothing people

Answer 2

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Answer 3

I don't agree with A.

Answer 4

It is not A. Because the hydrosphere is the layer that contains all water. Therefor water vapor would be the hydrosphere. The answer would be B. The atmosphere contains 21% oxygen, 78% nitrogen and the rest is other gasses.

Answer 5

It's B

Answer 6

JUST TELL US
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Answer 7

B nitrogen 78% and oxygen 21% are the most prevalent.

Answer 8

a
d
c
b
c
d
a
a

Answer 9

con nexus is so dumb cause the test is 21 questions not 8

Answer 10

just whats the answer

Answer 11

d
b
b
b

100% just took the quiz

Answer 12

What is the answer?

Answer 13

yeyebro is an idiot the test is 22 qustions long

Answer 14

ITS D. A recent decrease in carbon dioxide levels will increase plant growth on Earth.