water cycle: the continious movement of water between Earth's surface and the air, hanging from liquid to gas to liquid.
groundwater: water that seeps into the ground into spaces between bits of rock and soil
water table: the top of the water-filled spaces in the ground.
aquifer: an underground of rock or soil filled with water.
spring: a place were groundwater 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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