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6. What does the law of diminishing returns mean?
- Same as condensation point
- After a certain volume of fertiliser, it will make no difference.
- more fertiliser will reduce productivity
7. How many green house gasses are there?
8. Which of these isn't extra co2 addition by humans?
- Respiration
- Combustion
- Deforestation
9. True or false. Denitrifying bacteria are aerobic?
10. Name step one of Eutrophication?
- Anerobic respiration
- Leaching
- Algal bloom
11. Over a long time and pressure, what does dead animal matter turn into?
12. What happens after leaching of Eutrophication?
- no light
- Algal bloom
- leaching
13. Wat is NO-3
- Nitrate
- Ammonium
- Nitrite
- Nitrogen gas
14. Which of these doesn't increase crop yield?
- Music
- Fertiliser
- Ploughing fields to add oxygen
- Removing pests
15. What happens after the use of oxygen by saprobiaonts of Eutrophication?
- Fish die
- No light
- Algal bloom
16. What type of plant has nitrogen fixing bacteria on the roots?
- Long rooted
- Legumes
- Trees
17. Which of these is an illegal farming practice (livestock?)
- Strict diets
- Kept inside
- Hormone treatment
- Close together
18. Why is the green house effect good?
- Traps warmth
- Keeps in oxygen and other gases
- Protects us from the sun
19. What is it called when decomposers secrete enzymes?
- Extra cellular digestion
- Intra cellular digestion
- Enzyme action
- Hydrolysis
20. Where is methane formed?
- Intestines of primary consumers
- Cows
- Plants during photosynthesis