GCSE Earth and Space – The nitrogen cycle
Learning Objectives
-I can describe the nitrogen cycle
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Question 1 of 25
1. Question
What percentage of the air is made up of nitrogen?
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Question 2 of 25
2. Question
What is nitrogen gas in the air converted to?
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Question 3 of 25
3. Question
What is used to convert nitrogen gas into nitrate compounds?
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Question 4 of 25
4. Question
What also converts nitrogen gas in the air to nitrate compounds?
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Question 5 of 25
5. Question
What process converts nitrogen gas into ammonia?
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Question 6 of 25
6. Question
What is ammonia converted to?
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Question 7 of 25
7. Question
What is used to convert ammonia to nitrates?
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Question 8 of 25
8. Question
Where is nitrifying bacteria found?
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Question 9 of 25
9. Question
What absorbs nitrates from the soil?
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Question 10 of 25
10. Question
What do plants use nitrates for?
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Question 11 of 25
11. Question
What is animal protein?
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Question 12 of 25
12. Question
What are decomposers?
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Question 13 of 25
13. Question
What returns nitrogen back to the soil?
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Question 14 of 25
14. Question
How is nitrogen returned to the soil?
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Question 15 of 25
15. Question
Once ammonia is returned to the soil, what is it converted to?
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Question 16 of 25
16. Question
What is used to convert ammonia to nitrates when returning it to the soil?
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Question 17 of 25
17. Question
What can denitrifying bacteria also to?
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Question 18 of 25
18. Question
When does denitrifying bacteria return nitrogen gas back to the air?
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Question 19 of 25
19. Question
What process reduces the amount of nitrogen gas returned to the air?
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Question 20 of 25
20. Question
What does improving drainage do?
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Question 21 of 25
21. Question
How can farmers increase the nitrate content of soil?
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Question 22 of 25
22. Question
How can farmers increase the nitrate content of soil?
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Question 23 of 25
23. Question
What is the definition of crop rotation?
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Question 24 of 25
24. Question
Which of the following is an example of a natural fertiliser?
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Question 25 of 25
25. Question
Which of the following is an example of a natural fertiliser?
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