The shape of a water table is determined by the topography of the surface of the land above it. The high part of a water table separating parts sloping in opposite directions is called the
A. hydraulic gradient.
B. aquifer.
C. groundwater divide.
Answer: C
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Waves begin to "feel bottom" when the depth of water is ________
A) three times as great as the wavelength B) twice as great as the wavelength C) equal to the wavelength D) equal to its wave base
Today, no country has a death rate in excess of 21 per 1000.
a. true b. false
According to Steno's work concerning crystals:
a. corresponding interfacial angles of the same mineral increase with the size of the crystal b. corresponding interfacial angles of the same mineral decrease with the size of the crystal c. corresponding interfacial angles of the same mineral are constant regardless of crystal size d. corresponding interfacial angles are always the same for minerals in the same crystal system
The vast open ocean is dominated by picoplankton that are efficiently grazed by ________.
A. heterotrophic dinoflagellates B. ciliates and tintinnids C. whales D. copepods