Question

Which of the following statements about Earths atmosphere is true?

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

Earths atmosphere contains 21 percent oxygen.

Earths atmosphere contains carbon dioxide which all life forms require.

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

Answer 1

They are all about true. the number vary a bit. No all life needs carbon dioxide but many do. Earth's atmosphere blocks some radiation.

Answer 2

**Not all life needs carbon....

Answer 3

im a little confused can you explain a little more please?

Answer 4

What is confusing you?

Answer 5

Like does Earth need carbon dioxide?

Answer 6

Plants do, so yes, and we need to eat them.

Answer 7

So it would be the third on Right.

Answer 8

we would be fine with out it. it is a waist product for us.

Answer 9

...most of them are true. the one that is most wrong is the water vapor 78% is a lot. But it can happen. In my house it is about 50%, yesterday it was 100% out side (rain).

Answer 10

So it must be the second one?

Answer 11

That is true too

Answer 12

When I said they are all almost true I meant it. In general they are all true. They questions are just bad,