Recycling

Includes information on the carbon cycle, the nitrogen cycle and keeping decomposers working.

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Why does carbon need to be recycled?
Carbon needs to be recycled so it can become available again to other living organisms.
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How is Carbon Dioxide removed from the air?
Via photosynthesis from plants.
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How are carbon compounds passed along the food chain?
Via feeding.
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How is carbon dioxide released into the air?
By animals respiring, by soil and fungi acting as decomposers and by burning fossil fuels (combustion).
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Which body absorbs atmospheric carbon dioxide?
The oceans.
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What do marine organisms do with carbonate?
They make shells from them, which become limestone rocks.
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How does the carbon in limestone return to the air?
During volcanic eruptions or weathering of the rocks.
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How is nitrogen used in plants?
Plants take in nitrogen as nitrates, they use nitrates to create proteins for growth.
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How are nitrogen compounds passed along the food chain?
Via feeding.
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What happens to nitrogen compounds in dead plants/animals?
They are broken down by decomposers and returned to the soil.
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What are decomposers?
Soil bacteria.
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What do decomposers do?
The convert proteins into ammonia and urea.
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What does nitrifying bacteria do?
Nitrfying bacteria converts ammonia into nitrates.
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What does denitrfying bacteria do?
Denitrifying bacteria converts nitrates into nitrogen gas.
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Where is nitrogen-fixing bacteria found?
In the root nodules.
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What does nitrogen-fixing bacteria do?
Nitrogen-fixing bacteria fixes nitrogen gas. This occurs via the action oof lightening.
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What is needed to break down dead material in soil?
Oxygen and a suitable pH.
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How can decay be stopped?
Waterlogged soils will prevent decay because there is a lack of oxygen in them and acidic conditions will also prevent decay.
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Other cards in this set

Card 2

Front

How is Carbon Dioxide removed from the air?

Back

Via photosynthesis from plants.

Card 3

Front

How are carbon compounds passed along the food chain?

Back

Preview of the front of card 3

Card 4

Front

How is carbon dioxide released into the air?

Back

Preview of the front of card 4

Card 5

Front

Which body absorbs atmospheric carbon dioxide?

Back

Preview of the front of card 5
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