Green plants and some bacteria use carbon dioxide as a raw material in photosynthesis to make organic, carbon containing compounds, such as carbohydrates, which are eaten by animals. Both animals and plants use carbohydrates during respiration and release waste carbon dioxide into the atmosphere. During the day, the amount of carbon dioxide consumed by plants for photosynthesis is greater than that released from respiration; at night, however, the reverse is true.
That's right! Plants switch to OXYGEN at night to survive. They use the Oxygen to CARRY the ELECTRONS so that they can carry out their processes.
Let us not forget that we humans BURN our fair share of FOSSIL FUELS which releases Carbon compounds into the atmosphere.
Just like with the Nitrogen cycle, once the Carbon is "in" plants it can be eaten by animals and either leaves via faeces or death. Then DECOMPOSERS feed on dead material and release carbon dioxide into the air.
Dead material can also be unearthed by us humans and be used as FOSSIL FUELS. Plants can of course die and then the DECOMPOSERS go to work on them. Again, the key aspect to remember is that you cannot destroy an atom. THE CARBON MUST GO SOMEWHERE!
Thanks,
Adam King :-) X
Here's a pic to summarise my text:
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