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The oxygen cycle is mainly involved in maintaining the level of oxygen in the atmosphere. The entire cycle can be summarized as, the oxygen cycle begins with the process of photosynthesis in the presence of sunlight, releases oxygen back into the atmosphere, which humans and animals breathe in oxygen and breathe out carbon dioxide, and again linking back to the plants. This also proves that both the oxygen and carbon cycle occur independently and are interconnected to each other. The oxygen cycle elaborates how oxygen circulates in various forms through nature. Oxygen occurs freely in the air, trapped in the earth crust as chemical compounds, or dissolved in water. Oxygen in the atmosphere is about 21%, and it is the second most abundant gas after nitrogen. It is mostly utilized by living organisms, especially man and animals in respiration. Oxygen is also the most common element of human body. Oxygen is also used during combustion, decomposition, and oxidation. The ... Learn about the oxygen cycle, a biogeochemical cycle that involves the transformation of oxygen in various forms in the atmosphere, biosphere, hydrosphere, and lithosphere. Find out the sources, properties, and importance of the oxygen cycle for life on Earth. Learn about the Oxygen Cycle – its definition, key examples like photosynthesis and respiration, uses in biology, how oxygen is produced, and interesting facts about this important element.
