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

To start, here is a diagram...



Okay so...

Respiration - breathing basically. this releases carbon dioxide back into the air.

Photosynthesis - carbon is taken in (by the plants)

Decomposition - when plants and animals die, decomposers decompose them. this introduces carbon back into the soil

Combustion - things like wood and fossil fuels are burned. This releases carbon dioxide back into the air

The carbon dioxide in the air is then taken in by plants and the cycle continues(this is why plants are so important)