Editing Biogeochemical Cycles (section)

== <span style="color: #FFFFFF;">Remembering</span> ==
* '''Biogeochemical Cycle''' — The movement of matter through the biosphere, geosphere, hydrosphere, and atmosphere.
* '''The Carbon Cycle''' — The circulation of carbon (the building block of life) through the Earth.
* '''The Nitrogen Cycle''' — The process by which nitrogen is converted into various chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems.
* '''The Phosphorus Cycle''' — The movement of phosphorus (essential for DNA and ATP) through the crust and living things.
* '''The Water Cycle (Hydrologic)''' — The continuous movement of water on, above, and below the surface of the Earth.
* '''Reservoir (Pool)''' — A place where an element is stored for a period of time (e.g., the ocean is a carbon reservoir).
* '''Flux''' — The rate at which an element moves between reservoirs.
* '''Nitrogen Fixation''' — The process of converting atmospheric nitrogen (N2) into a form plants can use (ammonia), often performed by bacteria.
* '''Eutrophication''' — Excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
* '''Photosynthesis''' — The process by which plants use sunlight to turn CO2 into sugar (storing carbon).
* '''Respiration''' — The process by which living things release energy from sugar, releasing CO2 back into the atmosphere.
* '''Decomposition''' — The breakdown of organic matter by bacteria and fungi, returning nutrients to the soil.
* '''Transpiration''' — The release of water vapor from plants into the atmosphere.
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