Biogeochemical cycleDefinition (http://en.wikipedia.org/wiki/Biogeochemical_cycle) In geography and Earth science, a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical element or molecule moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth. A cycle is a series of change which comes back to the starting point and which can be repeated. (Wikipedia) Preferred Units: N/A Scope Note: N/A This term is used for the following terms: N/A Approved Date 06-Nov-2012 Click here to give feedback on this term or suggest an update. |