| Term | Definition |
| CO2 | Carbon dioxide: released during the carbon cycle; causes many global warming issues. |
| C6H12O6 | The formula for sugar made by a plant during photosynthesis. Its important to animal's energy |
| CH4 | Methane gas. Is expelled naturally through cow flatulent |
| CO3 and HCO3 | Carbonate and bicarbonate: limestone |
| Photosynthesis | Occurs in plant leaves with help of sun. carbon dioxide and water are taken in to make sugar and oxygen |
| Cellular Respiration | Occurs in all living things: when cells exhale water as gas |
| Assimilation | The consumption of elemental products in their cycle |
| Biosynthesis | When the body uses the chemicals assimilated to make things like DNA, carbohydrates, etc |
| Lithification | Limestone is produced when fossils and organic materials get compressed |
| Decomposition | The break down of organic materials and the release of CO2 |
| Coalifiation | Fossils become fossil feuls or coal over time |
| Combustion | The burning of fossil fuels and organic matter releases CO2 into the atmosphere |
| Volcanic Eruptions | limestone becomes magma and erupts; releasing CO2 into air |
| Uplifiting/weathering/erosion | Rocks become uplifted to top of soil |