What is biogeochemical cycling? State 2 processes in which matter changes its form for each of the following five cycles: carbon, phosphorus, nitrogen, oxygen, and sulfur.

Biogeochemical cycles are processes in which elements are recycled within the Earth's biosphere, these are done through environmental cycles and through Organisms such as Bacteria, for examples Cyanobacteria convert N2 and N through the process of Nitrogen fixation or Plants convert CO2 in C6H12O6 through Photosynthesis.