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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?

  • 3
  • 2
  • 1
  • 5

8. Which of these isn't extra co2 addition by humans?

  • Respiration
  • Combustion
  • Deforestation

9. True or false. Denitrifying bacteria are aerobic?

  • False
  • True

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?

  • Oil
  • Coal
  • Fungi

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