oxygen cycle The cycling of oxygen between the biotic and abiotic components of the environment (see biogeochemical cycle). The oxygen cycle is closely linked to the carbon cycle and the water cycle (see hydrological cycle). In the process of respiration oxygen is taken in by living organisms and released into the atmosphere, combined with carbon, in the form of carbon dioxide. Carbon dioxide enters the carbon cycle or is taken up by plants for photosynthesis. During photosynthesis oxygen is evolved by the chemical splitting of water and returned to the atmosphere. In the upper atmosphere, ozone is formed from oxygen and dissociates to release oxygen (see also ozone layer).
More From encyclopedia.com
Obliquity Of The Ecliptic , obliquity of the ecliptic See MILANKOVICH CYCLES. Nutrient Cycle , nutrient cycle(mineral cycle) A biogeochemical cycle, in which inorganic nutrients move through the soil, living organisms, air, and water, or throug… Cycle , Skip to main content cycle cycle •cackle, crackle, grackle, hackle, jackal, mackle, shackle, tackle •ankle, rankle •Gaskell, mascle, paschal •taberna… Glyoxylate Cycle , glyoxylate cycle A metabolic pathway in plants and microorganisms that is a modified form of the Krebs cycle. It utilizes fats as a source of carbon… Urea cycle , urea cycle (ornithine cycle) The series of biochemical reactions that converts ammonia, which is highly toxic, and carbon dioxide to the much less to… Sedimentary Cycle , Skip to main content sedimentary cycle sedimentary cycle A cycle which comprises the weathering of an existing rock, followed by the erosion of miner…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like