Which term describes the natural cycle of movement of water through the earth's systems?

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The movement of water through the earth’s systems in a continuous loop is described by hydrology. Hydrology is the science that examines how water travels, is stored, and transforms as it moves through the atmosphere, land, and bodies of water. It covers the entire water cycle—evaporation from oceans and other surfaces, condensation and cloud formation, precipitation, infiltration into soils, runoff, river and stream flow, and groundwater movement. This field looks at how these processes connect oceans, land, and living things and how water becomes available and changes in quality as it travels.

Meteorology focuses on weather patterns in the atmosphere, not the whole cycle of water moving through all Earth systems. Hydrochemistry deals with the chemical properties and reactions of water rather than the full movement and distribution of water through the environment. Hydraulics studies how fluids move in engineered systems like pipes and channels, rather than natural water motion across the landscape.