B2- Recycling

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  • Created by: Anjelala
  • Created on: 28-03-13 18:17
How does Carbon have anything to do with living organisms?
Carbon is one of a number of elements found in living organisms.
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Why should we recycle carbon?
We should recycle carbon so that it is available again to other living organisms.
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How is Carbon dioxide removed from the air?
By photosynthesis in plants.
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What process passes carbon compounds along a food chain or web?
Feeding.
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What releases carbon dioxide back into the air?
> Plants and animals respiring >Soil bacteria and fungi acting as decomposers >The burning of fossil fuels( combustion)
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Is carbon dioxide of any use to oceans?
Carbondioxide is absorbed from the air by oceans.
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Explain what the shells marine organisms make are made of...
Marine organisms make shells made of carbonate , which become limestone rocks.
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How can carbon in limestone return to the air?
Carbon in limestone can return to the air as carbon dioxide during weathering or volcanic eruptions.
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How and why do plants take in nitrogen?
Plants take in nitrogen as nitrates from the soil to make protein for growth.
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What happens to the nitrogen compounds in dead plants and animals?
They are broken down by decomposers returned to the soil.
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Name the 4 microorganisms responsible for the recycling of nitrogen...
1) soil bacteria and fungi 2) Nitrifying bacteria 3)Denitrifying bacteria 4)Nitrogen-fixing bacteria
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Explain how the 4 microorganisms are responsible for the recycling of nitrogen...
.>Decomposers(soil bacteria and fungi) convert proteins and urea to ammonia >Nitrifying bacteria converts ammonia to nitrate >Denitrifying bacteria converts nitrates to nitrogen gas >Nitrogen- fixing bacteria living in root nodules fix nitrogen gas.
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What 2 things are needed for decomposers to break down dead material in soil?
1) Oxygen 2) Suitable pH
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how will oxygen and a suitable pH help decomposers to break down dead material in soil?
> decay will be slower in waterlogged soils as there will be less oxygen > Acidic conditions will also slow down decay
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Other cards in this set

Card 2

Front

Why should we recycle carbon?

Back

We should recycle carbon so that it is available again to other living organisms.

Card 3

Front

How is Carbon dioxide removed from the air?

Back

Preview of the front of card 3

Card 4

Front

What process passes carbon compounds along a food chain or web?

Back

Preview of the front of card 4

Card 5

Front

What releases carbon dioxide back into the air?

Back

Preview of the front of card 5
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