<P> In geography and Earth science, a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth . There are biogeochemical cycles for carbon, oxygen, nitrogen, phosphorus, sulfur, and water; and there are human - induced cycles such as those for mercury and atrazine . In some cycles there are reservoirs where a substance remains for a long period of time (such as an ocean or lake for water). </P> <P> In the water cycle, water undergoes evaporation, condensation, and precipitation, falling back to Earth clean and fresh . </P>

Which of the following is not part of a biogeochemical cycle