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1331701
The Nitrogen Cycle
Description
GCSE Biology (B3 - Life on Earth) Mind Map on The Nitrogen Cycle, created by Leah Firmstone on 09/22/2014.
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biology
b3 - life on earth
gcse
Mind Map by
Leah Firmstone
, updated 6 months ago
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Created by
Leah Firmstone
over 10 years ago
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Resource summary
The Nitrogen Cycle
NITROGEN FIXATION
LIGHTNING
NITROGEN - FIXING BACTERIA
Converts nitrogen gas into soluble ions (nitrates) that plant roots can absorb.
THE HABER PROCESS
Converts nitrogen gas into ammonia for use in fertilizers
NITRATES
Plant roots absorb nitrates from the soil to build up proteins for growth ect.
When a plant is eaten, the nitrogen compounds are passed onto the next organism and so on.
NITRIFICATION
DECOMPOSERS
Waste, dead plants and dead animal bodies are broken down by decomposers in the soil.
Nitrogen is returned to the soil as ammonium ions.
NITRIFYING BACTERIA
Can convert the ammonium ions into nitrates for plants to absorb.
DENITRIFICATION
DENITRIFYING BACTERIA
Breaks down nitrates in the soil and returns nitrogen gas to the air.
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