Copy and paste this worksheet into a Word document
Go to misskitchenscience.blogspot.com
Click on The Nitrogen Cycle
Use the slide show to help you answer these questions
1. What percentage of air is nitrogen?
2. How is nitrogen returned to the Earth by animals?
3. What is denitrification?
4. What is nitrification?
5. What is leaching?
6. How do plants get nitrogen?
7. What do animals need nitrogen for?
8. Why do farmers buy nitrogen to lay on the ground?
9. Explain how too much nitrogen can kill aquatic animals
Click on the tractor icon
10. How do animals lose nitrogen?
11. What do legumes do to nitrogen in the atmosphere? How is this useful?
12. What does fertiliser provide?
13. name three ways that the plant gets nitrogen
14. What is a manure lagoon for?
Eutrophication
15. Use the internet to find a brief definition of eutrophication
Go to the Eutrophication link on Miss. Kitchen´s Science Page and state whether the followinf statements are true or false
16. Fertilisers are used in farming to provide crops with water
17. Fertilsers can cause water pollution
18. Fertilisers can dissolve in rainwater and drain into rivers and lakes
19. Growth of algae is decreased in the presence of extra nitrogen
20. Bacteria decompose dead algae quicker when there is more nitrogen
21. There is plenty of oxygen available when there are lots of plants being decomposed by bacteria
22. The fish and animals die because there is no oxygen
23.
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