4.9 -carbon cycle

1) Photosynthesis (CO2 + H2O -----> C6H12O6 + O2)
CO2 comes from the atmosphere (0.03%)                        This reduces the atmospheric CO2

2)Feeding 

• Produce ------> Primary consumers (Takes carbon from the producer for growth) -------> Secondary consumer (Same thing happens)
• The Consumers and producers respire, which sends CO2 into the atmosphere

                                                  Enzyme
3) Respiration (C6H12O6 + O2 ------->Energy + CO2 +H2O
                                                     Adds CO2 in the atmosphere

4) Decompostion:

• Eventually the producers & Consumers will die and will be decomposed (broken down) by bacteria and fungi (Decomposer Organisms)
• Releases CO2 back into the atmosphere

5) Combustion:

• Fossil fuels formed over millions of years (animals and plant materials) = oil/coal
• These are combusted to form CO2
• Best examples = Industrial applications and motor vehicles (cars, trucks, airplanes)
• But it can also be combusted naturally = lightning striking vegetation (forest/grassland fires)