B2c: Recyling

We are encouraged to recycle to save the Earth’s resources, but natural recycling is nothing new. The survey of local recycling schemes provides the opportunity to use ICT sources and tools to collect secondary data. 

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What happens when plants and animals die and decay?
The elements in their bodies are recycled. dead organisms are eaten by decomposers and the carbon in their bodies is returned to the atmosphere as carbon dioxide.
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What are many fungi and bacteria?
Decomposers.
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What are decomposers?
Decaying dead organisms.
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Why is the decay process so important?
It makes elements available to living organisms again.
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What do plants and animals do as they grow?
Take in chemicals and incorporate elements from these into their bodies.
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What are two of the most important elements required for plants and animals?
Carbon and Nitrogen.
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What is carbon taken up by plants as?
Carbon Dioxide.
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What is nitrogen taken up by plants as?
Nitrates.
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How much nitrogen is in the air?
78%
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Why can't nitrogen gas be used directly by plants and animals?
Because it is so unreactive.
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How is carbon recycled in nature? (marine)
oceans absorb CO2.marine animals convert C in diet 2 CaCO3.this makes their shells.shells of dead organisms collect on seabed&form limestone.earth movements cause limestone 2 become exposed 2 air.it's weathered&its C released back 2 atmosphere as CO2
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What might volcanic action do?
Release Carbon Dioxide.
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What do actions act as when absorbing carbon dioxide?
'Ocean sinks'
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What is the first stage of the nitrogen cycle?
N gas converts 2 nitrate compounds by nitrogen-fixing bact in soil/root nodules.Lightning converts N gas 2 nitrate compounds.Haber process converts N gas 2 ammonia 4 use in artificial fertilizers.Ammonia converts 2 nitrates by nitrifying bact in soil
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What is the second stage of the nitrogen cycle?
Plants absorb nitrates from the soil and use these to build up proteins. The plant may be eaten by an animal, and its biomass used to produce animal protein
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What is the third stage of the nitrogen cycle?
Urea and egested material is broken down by decomposers. This results in nitrogen being returned to the soil as ammonia
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What is the fourth stage of the nitrogen cycle?
Decomposers also break down the bodies of dead organisms resulting in nitrogen being returned to the soil as ammonia
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What is the fifth stage of the nitrogen cycle?
In some conditions denitrifying bacteria in the soil break down nitrates and return nitrogen to the air. This is usually in waterlogged soil. Improving drainage reduces this effect, making the soil more fertile.
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How is nitrogen recycled in terms of animals?
plants take in nitrates from soil to make protein for growth, feeding passes nitrogen compounds along a food chain or web, nitrogen compounds in dead plants and animals being broken down by decomposers and returning to the soil.
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How is carbon recycled in terms of plants?
C enters atmos as CO2 from resp&combust,CO2 is absorbed by producers 2 make carbohydrates in photosyn,A feed on P passing C compounds along food chain,most of C consumed is exhaled as CO2 formed during respiration,P&A die&eaten by decomposers.
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What could be a possible fossil fuel in the future - for what?
Plant and Animal material - for combustion
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Other cards in this set

Card 2

Front

What are many fungi and bacteria?

Back

Decomposers.

Card 3

Front

What are decomposers?

Back

Preview of the front of card 3

Card 4

Front

Why is the decay process so important?

Back

Preview of the front of card 4

Card 5

Front

What do plants and animals do as they grow?

Back

Preview of the front of card 5
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