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Water Defintions
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16
Science
6th Grade
12/15/2010

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Term
Evaporation
Definition
the change of state from a liquid to a vapor or gas
Term
condensation
Definition
the change of state from a gas to a liquid
Term
Precipitation
Definition
solid or liquid water that falls from the air to the earth
Term
Infiltration
Definition
movement of water into the ground due to the pull of gravity
Term
Percolation
Definition
downward movement of water through pores and other spaces in soil due to gravity
Term
Run-off
Definition
water that flows across land and collects into rivers, streams, and eventually the ocean
Term
Deposition
Definition
the process by which material is dropped or settled
Term
Watershed or drainage basin
Definition
the land drained by a river system , which includes the main river and all of its tributaries
Term
Delta
Definition
a fanshaped deposition of alluvium at the mouth of a stream
Term
Gradient
Definition
a measure of change in elevation over a certain distance
Term
Suspened Load
Definition
small rocks and soil in suspension making the river look muddy
Term
Zone of aeration
Definition
not completely filled with water, layer on top
Term
Zone of Saturation
Definition
spaces between the rock particles that are filled with water
Term
Water table
Definition
an underground boundary where the two zones meet
Term
Permeability
Definition
a rock's ability to let water pass through
Term
Porosity/porous
Definition
the amount of open space between individual rock particles
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