Question

Define Oxygen Cycle.​

Answer 1

Answer:

The oxygen cycle is the cycle that helps move oxygen through the three main regions of the Earth, the Atmosphere, the Biosphere, and the Lithosphere. The Biosphere is the sum of all the Earth's ecosystems. ... This also has some free oxygen produced from photosynthesis and other life processes

Explanation:

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Answer 2

In the oxygen cycle, oxygen atoms present in the earth circulate through a series of intricate processes. Like the nitrogen, carbon and water cycles, the oxygen cycle is a biogeochemical cycle. A biogeochemical cycle is movement of mater though the biotic and the abiotic spheres of ecosystem$.$