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4.3 Carbon Cycling
IB Syllabus
11
Biology
12th Grade
11/02/2015

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Term
Autotrophs convert CO2 into: ...
Definition
carbohydrates and
Term
In aquatic ecosystems in what forms is Carbon present? (2)
Definition
dissolved CO2 and hydrogen carbonate ions
Term
What does dissolved Carbon do to water's pH
Definition
makes it lower (acidic)
Term
What needs to happen to the pressure and temperature of a not decomposed dead organism for it to turn into a fossil fuel.
Definition
high pressure and high temperature
Term
By what is methane produced
Definition
archeans, including anaerobic methanogens
Term
How do archeans produce methane gas
Definition
when they metabolize food, methane is produced as a waste gas
Term
Why is an anaerobic environment sufficient for the formation of peat?
Definition
allows microorganisms to grow but prevents growth of decomposers, also because water is too acidic.
Term
How is coal produced from peat
Definition
by pressing of top layers of sediments above peat, making it into coal.
Term
Through combustion, what is produced?
Definition
CO2
Term
outline production of bio fuels
Definition
plant materials are fed to microorganisms. they ferment the material and release ethanol. ethanol can be used in gasoline eg. reducing amounts of gasoline.
Term
Name the seven steps of the carbon cycle
Definition
combustion, cellular respiration, photosynthesis, diffusion, consumption, decomposition, fossilization
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