Fresh Water

Term Definition
Water Cycle The continuous movement of water from the ocean to the atmosphere to the land and back to the ocean
Evaporation Takes place when water from the oceans and the Eartha??s surface changes into water vapor. Energy from the sun causes evaporation. Water gains energy during evaporation.
Condensation Takes place when water vapor cools and changes into water droplets that form clouds in the atmosphere. Water loses energy during condensation.
Precipitation Is rain, snow, sleet, or hail that falls from clouds onto the Eartha??s land and oceans.
Transpiration When plants release water from leaves and becomes water vapor
Runoff Is precipitation that flows over land into streams and rivers. This water later enters oceans.
Percolation Is the downward movement of water through pores and other spaces in soil due to gravity
Groundwater The water that falls and soaks into the ground if the ground is permeable
Water Table The upper surface of underground water; the upper boundary of the zone of saturation
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 consists of open spaces
Permeability The ability of a rock or sediment to let fluids pass through its open spaces, or pores
Impermeable Rock or sediment not being able to let fluids pass through open spaces, or pores.a
Artesian Spring A spring whose water flows from a crack in the cap rock over the aquifer
Well A human made hole that is deeper than the level of the water table
Zone of Aeration When rainwater passes through the upper zone
Zone of Saturation When the water collects in an area.

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