Question

Give a sketch of oxygen cycle explaining the meaning of different labels.​

Answer 1

Answer:

The atmosphere contains about 21% oxygen. ... The atmospheric oxygen enters the living organisms, as a gas required in respiration. During this process carbon dioxide and water are formed.

Answer 2

Oxygen cycle

• The oxygen cycle is the biogeochemical transitions of oxygen atoms between different oxidation states in ions, oxides, and molecules through redox reactions within and between the spheres/reservoirs of the planet Earth.
• The word oxygen in the literature typically refers to the most common oxygen allotrope, elemental/diatomic oxygen (O2), as it is a common product or reactant of many biogeochemical redox reactions within the cycle.
• Processes within the oxygen cycle are considered to be biological or geological and are evaluated as either a source (O2 production) or sink (O2 consumption).

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