Marine regression occurs when ____
A)sea level falls with respect to a continent
B)sea level rises and the shoreline moves inland
C)marine rocks undergo deep-sea pressure and are transformed to metamorphic rocks
D)sea water mixed several different layers of sediment types
E)volatile elements go into solution in sea water and change the composition of the sedimentary rocks that are formed
A
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Doppler radar detects motion within a supercell thunderstorm using the Doppler effect, which states that
A) Immobile objects will result in an increase in wavelength. B) objects moving away from the transmitter will result in an increase in wavelength. C) objects moving toward the transmitter will result in an increase in wavelength. D) objects moving away from the transmitter will result in an decrease in wavelength.
Which statement best captures the conflicts between folk and popular culture?
A) Folk culture is threatened by popular culture more than the reverse. B) Popular culture is threatened by folk culture more than the reverse. C) Folk and popular culture represent equal threats to one another. D) Folk traditions may produce more uniform landscapes. E) Globalization promotes diverse food preferences.
Why is the sea otter considered a keystone species in areas of the Pacific Ocean?
A) If sea otter populations were to crash, kelp forests could disappear because of overgrazing by sea urchins that would otherwise be controlled by the sea otters. B) Sea otters eat barnacles and mussels, and if sea otter populations were to crash, barnacles and mussel populations in tide pools would expand, causing a decrease in biodiversity in those areas. C) If sea otter populations were to crash, sea urchins would be unable to survive because kelp forests would become too dense. D) Sea otters were introduced to control kelp and other invasive plants, and without them, the plants would grow too thick to support crab and lobster populations in the area.
Why has the population of the Inland South, and its tertiary and quaternary economic sectors, both expanded so dramatically during the past two decades?
What will be an ideal response?