Tuesday, 21 June 2011

4.9 Carbon Cycle

describe the stages in the carbon cycle including respiration, photosynthesis, decomposition and combustion

In photosynthesis:
Co2+H2O==chlorophyll & light > C6H12O6+O2
Carbon dioxide+Water using light energy and chlorophyll turns into glucose and oxygen
[Carbon consists of 0.03% of the atmosphere]  [Oxygen is know for reducing the amount of carbon in the atmosphere]

Passage of carbon through the various trophic levels
Produce => Primary Consumer (takes carbon from the producer to grow) => Secondary consumer (carbon passes along)

Aerobic Respiration:
[Respiration adds CO2 to the atmosphere]
All organisms are giving off carbon dioxide to the atmosphere through the process of respiration

All of the organisms will die at some point and the organic molecules are broken down by decomposer organisms (bacteria, fungi) which will result to carbon dioxide being released back to the atmosphere.

Fossil fuels (oils, coals)==combustion> Carbon Dioxide
Industrial uses can contribute a lot of carbon dioxide to the atmosphere but so does motor vehicles (airplanes, cars, lorries etc.)
Naturally- Lighting striking vegetation can cause forest fires or grassland fires

Diagrams of carbon cycles:


  1. Hey daniel i am very weak in science, but the way you explained this carbon cycle is very good.
    Thanks . . .

  2. thanks to show it pictorially, it is easy to understand.

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