Question

Oxygen cyclein 20 points

Answer 1

Answer:

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.

Answer 2

Answer:

oxygen cycle, circulation of oxygen in various forms through nature. free in the air and dissolved in water, oxygen is second only to nitrogen in abundance among uncombined elements in the atmosphere