Water cycle: the continous movement of water between Earth's surface and the air, changing form liquid to gas to liquid.
Groundwater: water that seeps into the ground into spaces between bits of rcok and soil.
Water table: teh top of the water-filled spaces in the ground.
Aquifer: an underground layer of rock or soil filled with water.
Spring: a place where ground-water seeps out of the ground.
Well: a hole dug below the water table that water seeps into.
Reservoir: a storage area for freshwater supplies.
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