Besides geographic fit of continents, what other evidence did Alfred Wegener study to support his theory of continental drift?
A) ?Coal and fossilized remains of tropical plants are absent in frigid Antarctica.
B) ?Differences in fossils are found across separated continents.
C) ?Ice core samples indicate similar CO2 measurements at both poles.
D) ?The alignment of mountain ranges has a similar age, composition, and structure on both sides of the Atlantic.
D
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If the masses of two planetary bodies double, and the distance between them also doubles, the force between them would be
A. half as much. B. one-quarter. C. twice as much. D. none of the above
O2 ? 2 o
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Judge the following sentence according to the criteria given below: Coastal waters and upwelling areas are almost always blue in color BECAUSE they contain large amounts of microscopic marine algae and suspended particles
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
The longest ice core drilled was obtained at ________, Antarctica, in the 1990s.
A. McMurdo B. the south pole C. the geographic center D. Palmer E. Vostok