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
Condensation When water vapor cools and changes into water droplets that form clouds in the atmosphere
Evaporation When water from the oceans and the Eartha??s surface changes into water vapor
Precipitation Rain, snow, sleet, or hail that falls from clouds onto the Eartha??s land and ocean
Percolation The downward movement of water through pores and other spaces in soil due to gravity
Runoff Precipitation that flows over land into steams and rivers
Water Table The upper surface of ground 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 rock or sediment to let fluids pass through its open spaces, or pores
Artesian Spring A spring whose water flows from a crack in the cap rock over the aquifer
Transpiration The process where plants absorb water through the roots and then give off water vapor through pores in their leaves
Impermeable A rock that stops the flow of water
Well A human- made hole that is deeper than the level of the water table
Zone of Aeration Rainwater that passes through the upper zone
Zone of Saturation
The spaces between the rock particles are filled with water

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