Nitrogen fixation is the process by which nitrogen gas in the atmosphere is converted into ammonia or other nitrogen-containing compounds that can be used by plants and other organisms.

Oxygen is not a greenhouse gas because it does not absorb infrared radiation.

Decomposition is the process by which organic matter is broken down into simpler substances by microorganisms.

The lithosphere is not a major component of the carbon cycle because it does not contain a significant amount of carbon.

Nitrification is the process by which nitrogen-containing compounds are converted into nitrates.

The lithosphere is not a major component of the nitrogen cycle because it does not contain a significant amount of nitrogen.

Denitrification is the process by which nitrates are converted into nitrogen gas.

The atmosphere is not a major component of the phosphorus cycle because it does not contain a significant amount of phosphorus.

Weathering is the process by which phosphorus is released from rocks and minerals into the soil.

The lithosphere is not a major component of the sulfur cycle because it does not contain a significant amount of sulfur.

Weathering is the process by which sulfur is released from rocks and minerals into the soil.

The lithosphere is not a major component of the water cycle because it does not contain a significant amount of water.

Evaporation is the process by which water evaporates from the Earth's surface.

The lithosphere is not a major component of the carbon cycle because it does not contain a significant amount of carbon.

Carbon dioxide fixation is the process by which carbon dioxide is removed from the atmosphere by plants during photosynthesis.