When Galileo dropped balls from the Leaning Tower of Pisa, he
A. failed in their purpose.
B. confirmed Aristotle's teachings.
C. refuted Aristotle's teachings.
D. none of the above
Answer: C
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An igneous rock is fine-grained. What kind of rock is it, and how did it form?
A) a volcanic rock; it cooled quickly on the surface of the earth B) a plutonic rock; it cooled quickly beneath the earth's surface C) a hydrothermal rock; it cooled underwater D) a chemical rock; it cooled by the mixing of certain chemicals
According to data from lightning detection networks, the average thunderstorm across the continental United States and Canada produces ________ lightning strikes
A) 36 B) 100 C) 200 D) 280
Stratocumulus clouds
A) are middle-altitude clouds. B) cover only small portions of the sky. C) are common off the California coast. D) produce substantial precipitation, usually rain. E) all of the above
What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?
A. magma that is coming up along a bend in a transform fault B. movement of North America over a mantle plume C. a large meteorite impact that struck the area 100 years ago D. subduction along the coast of the Pacific Northwest