Carbon Cycle

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What are 2 factors that give rise to short term fluctuations in amount of O2 and CO2 in air?
Photosynthesis & respiration
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Give 2 human activities that contribute towards increased CO2 in air
Combustion of fossil fuels and Deforestation (removes amounts of photosynthesising biomass)
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How does the ocean contribute towards CO2 levels in air?
Excess CO2 in atmosphere dissolves in ocean - phytoplankton use this to form macromolecules that make up their bodies
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How is carbon emitted into the air via food chains?
Decomposers secrete enzymes on dead organisms which break down complex molecules into smaller ones that they can absorb - CO2 is then released via respiration
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Name 2 gases that contribute towards the greenhouse effect
CO2 and Methane
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Name effects of global warming
Melting of ice caps leads to extinction of animals and causes sea levels to rise, this may lead to flooding in low lying land - higher temps and less rainfall could lead to difficulties in crop growing
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Card 2

Front

Give 2 human activities that contribute towards increased CO2 in air

Back

Combustion of fossil fuels and Deforestation (removes amounts of photosynthesising biomass)

Card 3

Front

How does the ocean contribute towards CO2 levels in air?

Back

Preview of the front of card 3

Card 4

Front

How is carbon emitted into the air via food chains?

Back

Preview of the front of card 4

Card 5

Front

Name 2 gases that contribute towards the greenhouse effect

Back

Preview of the front of card 5
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