The unsaturated zone (vadose zone) is the area above the zone of saturation.
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The water table is the lower limit of the zone of saturation.
Zone of soil moisture is a zone where water is held by molecular attraction on soil particles in the near-surface zone.
Which of the following materials is most readily dissolved by water?
A. Clay minerals
B. Silica
C. Quart
D. Calcite
What percentage of the groundwater in the total volume of all liquid freshwater?
A. 94%
B. 3.6%
C. 2%
D. 0.05%