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4.7.2 organisation of an ecosystem
4.7.2.2 how materials are cycled
decomposing
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Vicky B
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what are decomposers?
a group of
microorganisms
that break down the
waste
and
dead
animals and plants
what are the chemicals that make up living organisms?
carbon
,
oxygen
,
hydrogen
and
nitrogen
what does the decay process mean?
the same
material
is recycled over and over again and often leads to
stable communities
what do decomposers do?
return
mineral
ions to the
soil
what does the decay process do with carbon?
returns it to the
atmosphere
as
carbon dioxide
that producers can use in
photosynthesis