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Science - Biology - The Carbon Cycle
Terms in this set (11)
The Carbon Cycle
All living organisms are made up of carbon chains that form our molecules. Carbon is also involved in key life processes such as respiration and photosynthesis.
The Carbon Cycle - Human Impacts
1. Fossil fuel burning. Releases large quantities of atmospheric carbon which would normally be stored in sinks under the ground.
2. Habitat loss. Ecological habitats such as reef systems and forests act as carbon sinks (they store carbon) and when they are destroyed all of this carbon is released into the atmosphere.
The atmosphere and oceans.
When living organisms gain energy from the uptake of oxygen and the expulsion of CO2 through oxidisation.
When plants use energy from the sun to produce glucose from CO2 and water.
When animals eat other organisms that have carbon stored in their bodies.
Breaking down organic matter through heat, light or chemical or biological activity, which releases the carbon stored in the organic matter.
The Cycle Step 1
Carbon is taken out of the atmosphere through photosynthesis and stored in the plant, though a bit of it is released through transpiration.
The Cycle Step 2
The plant dies and decomposers break down the organic matter, releasing the carbon into the soil.
The Cycle Step 3
This carbon is taken up by plants again or forms fossil fuel reservoirs.
The Cycle Step 4
Fossil fuels are burnt and the carbon is released as atmospheric carbon. Also, continuously throughout the cycle carbon has been being released through organism respiration.
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