In which of these settings would a river or lake lose water to groundwater?
A) Where the water table adjacent to the river is higher than the river
B) Where a lake is directly underlain by an impermeable layer
C) Where a river flows across an area where the water table is far beneath the surface
D) None of these are correct.
C) Where a river flows across an area where the water table is far beneath the surface
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Physiological density is the number of
A) acres of farmland per the total area of a country. B) farmers per area of farmland. C) people per area of flat land. D) people per area suitable for agriculture. E) farm animals per area suitable for agriculture.
All the following traits are heritable in humans except
A) shape of lips. B) hair color. C) eye color. D) hair length.
Glacially deposited strata were important in the development of continental drift theory because ____
A)the distribution of glacial deposits indicated that the entire Earth must have been glaciated at one time B)the distribution of coal-swamp deposits indicated that the entire Earth must have been very warm while glaciers formed C)they indicated that large glaciers affect the rate of continental drift D)the glacial deposits indicated that all of the southern continents must have been closer to the South Pole and contiguous E)they showed how glacier formation remained constant even when continents drifted
Which method best describes how the geologic time scale, which was developed through fossil successions in sedimentary rocks, was tied to absolute time even though sedimentary rocks cannot usually be dated directly by geochronology?
A) Geologists recently developed a technique to directly date sedimentary rocks, solving the problem. B) Geologists realized that there were many other cosmogenic isotopes besides Carbon 14 that allow the dating of sediments, and this has allowed the dating of sedimentary rocks. C) Geologist used things like volcanic ash beds, interbedded volcanic rocks, cross-cutting intrusive igneous rocks, etc. in sedimentary sections with a known fossil succession, and this age was extrapolated globally. D) Geologists estimated time through sedimentation rates, then using those rates together with maximum ages of underlying rocks that are datable, to extract a time interval and rate for deposition of the sedimentary rocks.