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Age 14-16 (KS4 / GCSE)

Animated presentation explaining the basic principles of the nitrogen cycle. 6 slides.

Published 21 Sep 2007

Contributed by Abigail Laing — Admin

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4 reviews

Hazel Petty - Member

Excellent clear presentation of a topic which many students find challenging. Images are fun and memorable and the definitions that go with each stage are at exactly the right level. Would be good to use as a class resource, or for independent study.

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Iain Fulton - Member

My class liked this because... It could be improved by...

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Anonymous

My class liked this because it went through the process stage by stage adding extra detail on separate slides. This made the learning more interactive and made them want to take notes. It could be improved by making a KS5 version including the names of the bacterial species involved.

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Anonymous

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Extracts from this resource

The Nitrogen Cycle - Presentation (GCSE version)

1 The Nitrogen Cycle
All living things need nitrogen-containing compounds which include proteins and nucleic acids.
78% of the atmosphere is nitrogen gas but most organisms cannot use nitrogen in this form.
The nitrogen cycle is an important nutrient cycle describing how nitrogen is stored and transferred.
2
nitrogen in the
atmosphere
animal proteindenitrifying
bacteriaammonium
compoundsplant proteinnitratesnitrifying bacterianitrogen fixing
bacteriadecomposersThe Nitrogen Cyclenitrogen fixation3Biological - through the action of nitrogen fixing bacteria found in the soil and in root nodules of plants
Atmospheric - through chemical reactions caused naturally by lightning
Industrial - through human-induced chemical reactions called the Haber Process which is how fertilisers are made
this is nitrogen fixationNitrogen in the atmosphere can be fixed into useful compounds (nitrates) in three ways:4Nitrates are then taken up by plants
which are eaten by animals
Nitrogen is stored in protein in plants and animals.
5Decomposers (bacteria and fungi) break down waste products and dead plants and animals converting them into ammonium compounds6Nitrifying bacteria convert ammonium

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