What are 2 factors that give rise to short term fluctuations in amount of O2 and CO2 in air?
Photosynthesis & respiration
1 of 6
Give 2 human activities that contribute towards increased CO2 in air
Combustion of fossil fuels and Deforestation (removes amounts of photosynthesising biomass)
2 of 6
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
3 of 6
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
4 of 6
Name 2 gases that contribute towards the greenhouse effect
CO2 and Methane
5 of 6
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
6 of 6
Other cards in this set
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
Card 4
Front
How is carbon emitted into the air via food chains?
Back
Card 5
Front
Name 2 gases that contribute towards the greenhouse effect
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