The oxygen cycle is the biogeochemical transitions of oxygen atoms between different oxidation states in ions, oxides, and molecules through redox reactions within and between the spheres/reservoirs of the planet Earth.

The carbon cycle is the process which carbon travels from the atmosphere into organisms and the earth and then back to the atmosphere.

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.

The oxygen cycle helps move oxygen through the three main regions of the Earth.

The carbon cycle is important to humans because all living organisms are built of carbon compounds and it is the fundamental building block of life and an important component of many chemical processes.

The role of microorganisms is to break down the proteins contained in the bodies of plants and animals into ammonia through the process of decay.

The three main regions are the atmosphere, biosphere and lithosphere.

The four processes are photosynthesis, decomposition, respiration and combustion.

Nitrogen is important to life because it is a key part of amino and nucleic acids. The nitrogen cycle describes how nitrogen moves between plants, animals, bacteria, the atmosphere (the air), and soil in the ground.

Carbon is found on Earth in the form of three different allotropes including amorphous, graphite, and diamond.

The Haber-Bosch is a complex chemical procedure that takes nitrogen from the air and under high pressures and temperatures combines it with hydrogen to produce ammonia.

The carbon cycle uses energy from the sun to chemically combine carbon dioxide with hydrogen and oxygen from water to create sugar molecules.

The four processes are fixation, ammonification, nitrification, and denitrification.