4.9

1.       Photosynthesis  - co2+h20 -> chlorophyll (light trapped)    c6h12o6+02

Co2 is 0.03% of the atmosphere

2.       Feeding                  producer -> primary consumer takes in carbon from producer and uses it for growth -> secondary consumer (carbon passes down food chain) all levels send out co2 into the atmosphere through respiration

3.       Respiration    C6H12O6+02 -> break down enzymes in the cell releasing enegy+co2 +h20

Respiration adds co2 to the atmosphere

4.       Decomposition.   Death and the organic molecules that remain are broken down by decomposition organisms i.e.: bacteria, fungi

5.       Combustion  fossil fuels -> oils and coals after loads of years -> they are combusted to release c02

Industrial applications and motor vehicles are good examples of using combust fuel

It can also occur in the environment naturally: lightening striking vegetation resulting in land fires

GOOGLE: “carbon cycle”

Picture of Carbon Cycle