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.
Infiltration The process by which water on the ground surface enters the soil.
Evaporation The process by which water changes from a liquid to a gas or water vapor.
Condensation The process which water vapor changes back to a liquid. Responsible of forming clouds. The opposite of evaporation.
Transpiration
Precipitation
Groundwater
Water table The upper surface of underground water. The upper boundary of the zone of saturation. The boundary between the zone of aeration and the zone of saturation.
The process by which of moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere.
Water released from clouds in the form of rain, freezing rain, sleet, snow, or hail.
The water that continues downward through the soil until it reaches rock material that is saturated. Water under the surface.
Runoff Precipitation that flows over land into streams and rivers. This water later enters the oceans.
Artesian well A well in which water is under pressure; especially one in which the water flows to the surface naturally.
Aquifer A body of permeable rock that can contain or transmit groundwater.
Springs The result of an aquifer being filled to the point that the water overflows onto the land surface.
Zone of aeration
Zone of saturation
Permeable
Non-permeable
Porosity
The zone nearest to the surface where gaps between soil are filled with both air and water.
Below the zone of aeration where the gaps are filled with water.
Ability of a substance to allow another substance to pass through it especially the ability of a porous rock, sediment, or a soil to transmit fluid through pores and cracks.
A substance does not have the ability to allow another substance to pass through it.
Quality of being porous, or full of tiny holes. Allows water to pass through it.

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