precipitation - water that falls from clouds, groundwater - water that pools under the ground, aquifer - layer of rock, gravel, and sand where water collects, glacier - large sheet of ice that moves over land, water cycle - continuous movement of water , evaporation - process by which a liquid changes to a gas without boiling, condensation - when a gas changes to a liquid, surface runoff - water that flows over Earth's land, estuary - body of water where fresh water mixes with salt water,

Earth's Waters

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