1) Which type of microorganism converts dead organisms into nitrates. a) yeast b) bacteria c) amoebas 2) The dead organisms provides food/glucose for the bacteria to grow. a) True b) False 3) Why do plants needs nitrates? a) growth & make proteins b) growth & respiration c) respiration 4) Animals produce their own protein a) True b) False 5) When dead animals are broken down by bacteria this is called.... a) absorption b) decomposition c) eating d) defaecating 6) When plants take in nitrate from the soil this is called.... a) absorption b) decomposition c) eating d) defaecating 7) How do animal get their nitrogen? a) absorption b) decomposition c) eating other organisms d) defaecating 8) Animal require nitrogen to build up a) carbohyrates b) fats c) proteins d) vitamins 9) Plants obtain nitrigen from the soil through their roots in the fom of... a) phosphates b) sulfates c) nitrates d) nitrites 10) If soil is low in nitrogen growth of crops will... a) decrease b) not change c) increase 11) Which activity would increase nitrogen levels in the soil? a) Add manure b) Plough the field c) Water regularly d) Remove crops 12) Which activity would increase nitrogen levels in the soil? a) Remove manure b) Grow peas and plough it back into the soil c) Water regularly d) Remove crops

Nitrogen cycle quiz

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