Carbon Cycling + Flashcards

Methane

________ is a carbon molecule which is produced in anoxic conditions and can oxidise into carbon dioxide and water.

Anaerobic refers

________ to organisms that are able to survive without oxygen.

Peat

________ is partially digested organic matter than forms in acidic, water- saturated soil.

Fossil fuels

________ are organic matter that has been compressed over time to form coal, oil and gas.

Methanogens

________ are archaea that are anaerobic organisms that obtain energy through the synthesis of methane from CO2 and H2 or acetate.

aquatic ecosystem

In a(n) ________, carbon is present in the form of carbon dioxide and hydrogen carbonate ions.

Autotrophs

________ transform carbon dioxide into more complex carbon- based compounds, such as glucose.

Combustion

________ and respirations, which releases carbon back into the atmosphere.

Oil

________ and natural gas is formed in mud.

carbon dioxide

In the atmosphere, methane is oxidized into ________ and water (release of CO2 result of methanogenesis)

Land plants

________ absorb carbon dioxide through their stomata, which are pores found on the underside of their leaves.

Carbon

________ is found in both the abiotic and biotic parts of an ecosystem.

Carbon sinks

________: decrease in CO2 in the atmosphere.

Autotrophs

________ produce most of the carbon found in organisms.

fossil fuels

The carbon trapped in ________ is released into the atmosphere through combustion, which is a process of burning, which releases carbon dioxide from organic material.

Calcium carbonate

________ is an important source of carbon in the environment, as it makes up the shells and exoskeletons of various animals and can eventually become porous sedimentary rocks like limestone.

Autotrophs

________ take up and give off oxygen during photosynthesis, allowing for the existence and survival of heterotrophs.

Carbon dioxide

________ dissolved in oceans.

carbon sinks

decrease in CO2 in the atmosphere

carbon sources

increase in CO2 in the atmosphere