The carbon cycle is composed of
two important processes: photosynthesis and respiration.
1. Plants absorb carbon-dioxide form the atmosphere and
combine it with water to produce carbohydrates and give out oxygen – process is
2. When animals consume plants (as food), they oxidize
the food at cellular level and breathe out carbon dioxide – process is called
3. Also, during night, most plants perform respiration
instead of photosynthesis and give out carbon dioxide.
4. Carbon dioxide is also highly soluble in water and is
absorbed in large quantities by the water bodies. It can also be stored in
rocks in the form of carbonates.
5. After death of a plant or
animal, decomposition takes place and carbon dioxide gets released into
6. Carbon can also be buried inside the
earth and converted to coal or natural gas. Natural gas and Coal are fuels and
on combustion they release carbon dioxide back into the atmosphere.