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 of these is not a source of nitrates? a) Lightening b) Water logged soil c) Nitrogen fixation d) Nitrification e) Haber process 7) Which bacteria convert nitrates to nitrogen? a) Nitrogen fixing b) Nitrifying c) Denitrifying d) Nitratifying 8) Where do nitrogen fixing bacteria live? a) In leaves b) In root nodules c) In decaying organisms d) In water logged soil 9) What is this an example of a) Parasitism b) Habitat c) Microhabitat d) Mutualism

Nitrogen cycle

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