A large flood in a river may cause abrupt shifts leading to the carving of a new channel. The point at which this change occurs is a(n)
A) type of dynamic equilibrium condition.
B) type of metastable equilibrium.
C) threshold.
D) input.
Answer: C) threshold.
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Which of the following is correct regarding permafrost?
A) It develops where soil or rock temperatures are below freezing for at least two years. B) It primarily occurs in areas covered with glaciers. C) The surface layer of permafrost never thaws, even in the warm season. D) It tends to occur at lower elevations in the midlatitudes than in the high latitudes.
A highway map is what type of map?
A. cartogram B. general purpose C. thematic D. all of these
How is it possible that coastal deserts exist in such a close proximity to ocean moisture?
What will be an ideal response?
Ice crystals that sublimate before reaching Earth are called
A) graupel. B) sleet. C) fallstreaks. D) freezing rain. E) virga.