Describe the oxygen cycle
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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.
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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.
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