Term Definition
Evaporation Takes place when water from the oceans and the Earths surface changed into water vapor.
Water Cycle The continues move meant of water from the ocean to the atmosphere to the land and back to the ocean.
Condensation Takes place when water vapor cools and changes into water droplets that form clouds in the atmosphere.
Precipitation Is rain, snow, sleet, or hail that falls clouds onto the Earths land and oceans.
Runoff Is precipitation that flows over land into streams and rivers.
Percolation Is the downward movement of water through pores and other spaces in soil due to gravity.
Groundwater The water located within the rocks below the Earths surface.
Water table The upper surface of groundwater; the upper boundary of the zone of saturation.
Impermeable A rock that stops the flow of water.
Well A human made hole that is deeper than the level of the level of the water table.
Zone of aeration Rainwater passes through the upper zone.
Aquifer A body of rock or sediment that stores groundwater and allows the flow of groundwater.
Porosity The percentage of the total volume of a rock or sediment that consist of open spaces.
Permeability The ability of a rock or sediment to let fluids pass through its open spaces, or pores.
Zone of saturation The water collects in an area.
Artesian spring A spring whose water flows from a crack in the cap rock over the aquifer.
Fresh Water

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