The Carbon Cycle Diagram - Combustion, Photosynthesis, Respiration, Decomposition
The Carbon Cycle
Ocean The ocean has a large store of carbon dioxide. Some of the dissolved carbon dioxide is used in photosynthesis by organisms like phytoplankton.
Some animals in the ocean convert some of the carbon in their diet to calcium carbonate to make their shells. Over time, these organisms fall to the seabed, build up, and form limestone. This can be exposed over time and the carbon released back into the atmosphere through weathering.
Combustion Also known as burning. Combustion is used in many areas of human society. The burning of fossil fuels is used in most forms of transportation and also in the generation of electricity. The general word equation for combustion is fuel + oxygen → carbon dioxide + water.
Animal Respiration This is a reaction that takes place in all living things. Energy is released from glucose using oxygen. The products of this reaction are carbon dioxide and water. The equation for aerobic respiration is C6H12O6 + 6O2 → 6CO2 + 6H2O (+ energy).
Photosynthesis This is the process used by plants to create food. Plants use sunlight to synthesize (combine) water and carbon dioxide within cells that contain chlorophyll. The equation for photosynthesis is 6CO2 + 6H2O → C6H12O6 + 6O2.
Decomposition The process of breaking down organic matter by other living organisms such as worms, bacteria, and fungi. The decomposers then release the carbon into the atmosphere through respiration.
Plant Respiration As well as photosynthesizing, plants also respire. This is the same process that takes place in animals.