4.9) Carbon Cycle

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

Components of cycle:

1. Photosynthesis

6CO2 + 6H2O -----light energy----> C6H12O6 + 6O2

carbon dioxide = 0.03% of the atmosphere

When photosynthesis occurred, it reduces the atmospheric carbon dioxide.

2. Feeding

Producer ----> Primary Consumer ----> Secondary Consumer

Primary consumer takes in carbon form the producer and turns it into chemical they can use to grow.

Carbon passes along the food chain.

3. Respiration (all organisms carry out respiration)

glucose + oxygen ----enzyme/cell----> energy + carbon dioxide

Respiration adds carbon dioxide to the atmosphere.

4. Decomposition (after death)

Organic molecules of dead organisms are broken down by decomposers such as bacteria and fung9

This add carbon dioxide back into the atmosphere.

5. Combustion 

- Fossil fuel (oils & coals) --------combusted-----> Carbon dioxide

example: industrial application, motor vehicles, etc.

- Natural Combustion

eg) lightning striking forest tree which leads to fire