Material cycling in ecosystems - OCR Gateway

1

Which of these is a biotic component of an ecosystem?

2

Which of these processes is NOT part of the carbon cycle?

3

Which process occurs when water is absorbed into the ground?

4

Which process releases water vapour into the atmosphere?

5

Which of these is the correct order of events for the water cycle when water from the ocean forms clouds?

6

Which of these substances contain nitrogen?

7

What do nitrogen-fixing bacteria do?

8

What do nitrifying bacteria do?

9

Which process removes carbon dioxide from the atmosphere?

10

Which of these species are NOT decomposers?