The spread of an underlying principle, such as a new technological innovation, is an example of
A) spatial interaction.
B) expansion diffusion.
C) space-time compression.
D) stimulus diffusion.
E) distance decay.
Answer: D) stimulus diffusion.
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The asthenosphere is the outer layer of Earth, which is rigid and is broken into individual plates
a. True b. False
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A) thinner; less B) thinner; more C) thicker; more D) thicker; less
Heap-leach extraction removes gold from ore by
A. Digging the gold out of the mountains B. Pouring gravel into holding tanks C. Spraying cyanide on a pile of ore gravel D. High-pressure spraying of ore E. Roasting ore to release the gold