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Water that lands on soil can

infiltrate (sink in) or run off (move over the surface).

Evaporation is greatest when it is

hot, dry, and windy -- also increase surface area.

Condensation is when

water vapor turns into liquid water

Transpiration is when

water vapor enters the atmosphere through plants.

Zone of Aeration is the

air between soil

Zone of Saturation is the

water between soil (think saturated sponge).

The water table is the

boundary line that separates the two zone.

Infiltration occurs when the land is

permeable, unsaturated, low slope, not frozen.

Runoff occurs when the land is

impermeable, saturated, steep slope, frozen ground.

Permeability

how fast water flows through soil.

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