The Water Cycle
The water cycle (also known as the hydro-logic cycle) is the term to describe the process of water moving from the land and sky.
2H2+O2 --> 2H20 | H+(Aq) + OH - (Aq) -> H2O
The Nitrogen Cycle
The biogeochemical cycle where nitrogen is changed into various chemical forms as it moves between the atmosphere, and terrestrial and marine ecosystems.
N2 -> NH4+ | NH4+ -> N03- | N03 -> N2 N02
The biogeochemical cycle that carbon is exchanged between the biosphere, pedosphere, geosphere, and atmosphere.
CO2+H2O -> C6H12O6 + O2 | CH4 + O2 -> CO2 + H2O + Energy
The Phosphorous Cycle
The biogeochemical cycle that describes the movement of phosphorous through the lithosphere hydrosphere and biosphere.