What can occur during the evolution of a hot spot?
A. formation of rifts that radiate out from the hot spot
B. thickening of the crust beneath a passive margin
C. formation of a fold and thrust belt
D. an initial period of subsidence as magmas rise from the mantle
E. None of these.
Answer: A
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A clastic sedimentary rock composed of pebbles (40%), cobbles (25%), boulders (10%) and sand (25%; even amounts of quartz and feldspar) would be called a(n)
A) sandy pebblestone. B) conglomeratic pebblestone. C) arkose. D) sandy conglomerate.
Additional weight added to a hillside, which is always the result of human activities, is called
____________________. Fill in the blank(s) with the appropriate word(s).
What is the Gaia hypothesis?
A) a hypothesis that states the Earth is alive B) the concept of environmental unity C) the hypothesis lying at the root of uniformitarianism D) a set of hypotheses that likens the Earth to a superorganism with interrelated, mutually adjusting systems
The polar cell
A. has low pressure centered over land in the northern hemisphere. B. has high pressure centered over land in the southern hemisphere. C. has surface winds out of the west, easterly winds aloft. D. has low pressure centered over the poles resulting in stormy conditions.