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hydrologic cycle
movement of H2O (in different states) between sources & sinks
evaporation
liquid water becomes water vapor (gas) in atmosphere
condensation
water which collects as droplets on a cold surface when humid air is in contact with it
precipitation
any product of the condensation of atmospheric water vapor that falls quickly from a cloud
surface runoff
precipitation that runs off the landscape
transpiration
process plants use to draw groundwater from roots up to their leaves
groundwater
water found underground in the cracks & spaces in soil & rock
aquifer
underground layer of water-bearing material, consisting of permeable or fractured rock, or of unconsolidated materials
permeable
able to let water pass through