The Antarctic circulation is dominated by what single large current?
a) The Antarctic surface water current
b) The Antarctic circumpolar current (West Wind Drift)
c) East Wind Drift
d) Antarctic Bottom Water
e) North Atlantic Deep Water
B
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Which of the following is NOT a common a problem associated with volcanic ash-fall?
A. filling of stream channels B. destruction of crops C. disruption of air travel D. building collapse E. forest fires
The phrase “survival of the fittest” has often been used to describe the theory of natural selection
a. True b. False
Daily and seasonal temperature cycles depend primarily on:
A) only solar radiation. B) only terrestrial radiation. C) the combined effects of solar and terrestrial radiation. D) distance from the Sun. E) friction between the wind and Earth surface.