What have differing paleomagnetic records for each continent shown?
A)Each continent had its own magnetic pole during successive geological periods.
B)Magnetic poles for each continent have moved over geological time.
C)Magnetic poles have remained in one location and each of the continents has moved.
D)Both the poles and the continents have moved over time.
E)Some data are inconsistent with the theory of polar wandering, indicating that further research must be done.
C
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A. A and B B. B and D C. A and D D. A, B, and C only E. C and D
The upper part of a glacier, the part with perennial snow and ice, is called the ________.
A. discharge zone B. zone of accumulation C. zone of ablation D. recharge zone E. zone of wastage
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A) linear mountain chains on the seafloor B) deep, linear trenches in the seafloor C) long linear valleys with faults along the sides D) seamounts and atolls on the seafloor
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A) alkanes B) alkenes C) alkynes D) none of these