Developing the atmosphere - AQA

1

Which gas was thought to be a major part of the early atmosphere?

2

Which of these planets has an atmosphere most similar to what scientists thought the Earth's early atmosphere was like?

3

In the modern day atmosphere, what is the approximate percentage of nitrogen?

4

The early atmosphere contained a lot more water vapour than the modern atmosphere does. Where did it go?

5

What biochemical process absorbs carbon dioxide from the atmosphere and replaces it with oxygen?

6

Which of the following is the correct word equation for photosynthesis?

7

Which process removed carbon dioxide from the atmosphere?

8

Which of the following is not a fossil fuel?

9

How long does it take to form fossil fuels?

10

Why did nitrogen build up in the atmosphere?