On Earth today, mountains such as the Himalayas are rising because of
A) extensive erosion caused by increases in rainfall in those regions.
B) subterranean pockets of natural gas forcing their way to the surface.
C) low density rocks that are being forced upward through high density rocks.
D) collisions between tectonic plates.
D
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Indicate whether this statement is true or false.
During December solstice, the
A) entire area poleward of the Antarctic Circle remains out of sunlight. B) entire area poleward of the Tropic of Capricorn remains out of sunlight. C) entire area poleward of the Arctic Circle remains out of sunlight. D) entire area poleward of the Tropic of Cancer remains out of sunlight.
In the 1900s, fuel efficiency in transportation greatly increased when engines were converted from
A) natural gas to coal and steam. B) oil to coal and steam. C) coal and steam to gasoline. D) natural gas to gasoline.
The Coriolis effect ________
A) keeps the wind circulating at constant speed around the planet B) is caused by the moon C) keeps Earth from spinning too fast D) results in seasonal periods of 24-hour darkness at the poles in winter E) is caused by earth's rotation