1) Why is nitrogen need for living things? a) To make protein b) For respiration c) For energy d) To breathe 2) Why can plants not use Nitrogen from the air? a) Nitrogen burns plants b) They can't photosynethsise c) It is too unreactive d) There is not enough of it 3) How do animals get the nitrogen they need? a) By breathing it in b) It is already in their body c) They don't need nitrogen d) By eating plants 4) What is released when an organism decomposes? a) Ammonia b) Monomonia c) Nitrates d) Nitrogen 5) Which bacteria convert ammonia to nitrates? a) Nitrogen fixing b) Nitrifying c) Denitrifying d) Ammonifying 6) Which bacteria convert nitrates to nitrogen? a) Nitrogen fixing b) Nitrifying c) Denitrifying d) Nitratifying 7) Where do nitrogen fixing bacteria live? a) In leaves b) In root nodules c) In decaying organisms d) In water logged soil 8) Plants obtain nitrogen from the soil through their roots in the form of ___________. a) nitrites b) nitrogen c) nitrates d) proteins

N4 Nitrogen cycle

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