The main source of groundwater is
A) surface water where it intersects the zone of recharge.
B) the zone of aeration above the water table.
C) hygroscopic water in the soil.
D) precipitation that percolates downward as gravitational water.
D
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What process accounts for the layers found in Earth?
a. Plate tectonics b. Accretion c. Density stratification d. Subduction
The outermost gases of early Earth were initially destroyed by radiation from the sun, but the underlying atmosphere remained intact
Indicate whether the statement is true or false
All of the following statements about particulates are true, except
A) they can be solid. B) they can be liquid. C) they can have natural sources. D) they are larger than aerosols.
The doldrums are associated with the subtropical pressure belt, and the horse latitudes are associated with the equatorial belt
Indicate whether the statement is true or false