Precipitation Groundwater Runoff Transpiration Evaporation Sublimation Condensation
Introduction
Evaporation
Transpiration
Sublimation
Condensation
Precipitation
Runoff
Groundwater
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Introduction

Water and energy are circulated across planet Earth in what is known as the Hydrologic Cycle. This cycle is responsible for creating storms and weather, moving water through river channels, and providing land with fresh water. The cycle involves four general steps: moving water from the surface to the atmosphere in a gaseous form, moving the water vapor through the atmosphere, returning the water to the surface, and moving the water across the surface.

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