Geologists resolved the apparent polar wandering paradox by concluding that
a. each continent had its own magnetic pole during successive geological periods.
b. the magnetic poles for each continent had moved over geological time.
c. the 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. none of the above
C
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Which of the following is a stochastic interpolation method?
A. thin-plate splines B. Thiessen polygons C. kriging D. inverse distance weighted E. none of these is correct
About 50% of flash flood deaths are ________.
A. vehicle-related B. related to people trying to retrieve pets from flooded homes C. related to people watching floods from bridges D. related to people swimming across flooded rivers E. boat-related
Discuss the development of scientific instruments in the 20th century used to map the seafloor. Include in your answer the timeframe when each instrument was developed and a brief description of how it works
What will be an ideal response?
Volcanic rocks are
A. by definition, only those produced by conelike volcanic structures. B. coarse-grained because the magmas typically spend so long inside the volcano before eruption. C. crystallized from magma at or near the earth's surface. D. All of the choices are correct.