Natural cycles and decomposition - Edexcel

1

Which process removes carbon dioxide from the atmosphere?

2

Which conditions make decay happen at a faster rate?

3

What do nitrogen-fixing bacteria do?

4

What do nitrifying bacteria do?

5

Which of these substances contain nitrogen?

6

Which process releases water vapour into the atmosphere?

7

Which of these are decomposers?

8

Which gas is needed for decomposers to respire?

9

What is potable water?

10

Which process occurs when water is absorbed into the ground?