Biogeochemical cycles are natural processes that recycle essential elements like carbon, nitrogen, and water through Earth's ecosystems.

The phosphorous cycle is a biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.

The carbon cycle is a process where carbon atoms are recycled through the Earth's ecosystems.

Learn about the water cycle, including processes like evaporation, condensation, and precipitation.

Learn about the water cycle and its importance in the ecosystem on Khan Academy.

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