desalination = getting fresh wate from seawater .
water cycle = the continuos movemenr of water between earth's surface and the air , changing from liquid to gas to liquid .
groundwater= wate that seeps into the ground into spaces between bits of rock and soil.
water table=the top of the water-filled space in the ground.
aquifer = an underground layer of rock or soil filled with water.
spring = a place where groundwater seeps out of the gound.
well= a hole dug below the water table that water seeps into.
reservoir= a storage area for freshwate supplies .
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