A number of different types of chemical cycles geochemical cycles occur on Earth. Biogeochemical cycles play an important role in sustaining the biosphere.
Notable active chemical cycles on Earth include:
* Carbon cycle – consisting of an atmospheric carbon cycle (and carbon dioxide cycle), terrestrial biological carbon cycle, oceanic carbon cycle and geological carbon cycle
* Nitrogen cycle – which converts nitrogen between its forms through  fixation, ammonification, nitrification, and denitrification
* Oxygen cycle and Ozone–oxygen cycle – a biogeochemical cycle  of circulating oxygen between the atmosphere, biosphere (the global sum of all ecosystems), and the lithosphere
* Ozone-oxygen cycle – continually regenerates ozone in the atmosphere and converts ultraviolet radiation (UV) into heat
* Water cycle – moves water continuously on, above and below the surface shifting between states of liquid, solution, ice and vapour
* Methane cycle – moves methane between geological and biogeochemical sources and reactions in the atmosphere
* Hydrogen cycle – a biogeochemical cycle brought about by a combination of biological and abiological processes
* Phosphorus cycle – the movement of phosphorus through the lithosphere, hydrosphere, and biosphere
* Sulfur cycle – a biogeochemical process resulting form the mineralization of organic sulfur, oxidation, reduction and incorporation into organic compounds
* Carbonate–silicate cycle transforms silicate rocks to carbonate rocks by weathering and sedimentation and transforms carbonate rocks back into silicates by metamorphism and magmatism.
* Rock cycle – switches rock between its three forms: sedimentary, metamorphic, and igneous
* Mercury cycle – a biogeochemical process in which naturally occurring mercury is bioaccumulated before recombining with sulfur and returning to geological sources as sediments
Other chemical cycles include hydrogen peroxide.