4.9 Carbon Cycle

1. Photosynthesis
Co2 + H20  are combine in photosynthese using clhorophyll to trap the light energy to make glucose and oxygen.


Co2 come from atmosphere. 


Photosynthesis when occur is responsible for reducing the atmospheric Co2.


2. Feeding - passage of carbon in the different trophic levels.
 Higher trophic levels will take up the lower trophic levels carbon  and travel through the food chain . Use carbon for growing.
eg. Producer -> Primary consumer -> Secondary 
consumer


3. Respiration - It adds Co2 to the atmosphere.
All organism give off Co2 to the atmosphere by respiration.


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


5. Combustion - 

• fossil fuel ( oils and coals) are combusted to release CO2. -> mainly by Industrial and vehicles
•  Environment naturally -> lighting striking plants ->forest fires / grassland