How carbon dioxide enters and returns to the atmosphere?

Question

how carbon dioxide enters and returns to the atmosphere

... dont make your answer complicated i hate complicated knowledge

Answer 1

Carbon dioxide is present in the atmosphere in relatively small quantities but its cycling between the atmosphere and the earth is vital to life.It is taken by plants during photosynthesis,converted into carbohydrate,transferred into animals by their ingestion of plant matter and released back into the atmosphere through animal respiration.Thus,while plants absorb carbon dioxide during photosynthesis,all living organisms respire and release carbon dioxide. Decomposing bacteria also does the same thing in regard to dead matter.

Fossil fuels(coal,oil,shale etc) are the preserved remains of plant and micro-organisms and therefore they contain carbon.When they are burnt,carbon dioxide is released,and it enters the atmosphere.

Volcanoes and the burning of large regions of tropical forests also produce carbon dioxide.

The oceans absorb 25 percent of all carbon dioxide released into the atmosphere.Some of it is used up by sea creatures to make calcium carbonate shells.These in turn,along with carbonate-rich sediments can be turned into sedimentary rock.Carbon dioxide is released into the atmosphere by the weathering of these carbon-rich rocks such as chalk and limestone.

Answer 2

Carbon dioxide dissolves into the rest of our gasses, like how salt can dissolve in water. Carbon dioxide can exit our atmosphere the same way that oxygen can dissolve in water.