What do studies of paleomagnetism show?
a. the northern and southern hemispheres have reversed position many times
b. the ocean basins are young
c. each continent once had its own magnetic pole
d. the continents remain fixed and the north magnetic pole has moved
e. all of these
b. the ocean basins are young
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European planning and construction of cities in the colonies was based on
A) European concepts, practices, and functional needs. B) local environments and climate. C) local cultures and preferences. D) capitalist democratic principles. E) building up local political and economic capacities.
Over the last three decades in the United States,
A) soil erosion has steadily increased while wind erosion has steadily decreased. B) estimates and actual measurements indicate that soil erosion has decreased. C) the increased reliance on plowing and technology has increased soil and wind erosion. D) measurements of the amount of soil in major rivers indicate great increases in soil erosion.
If the temperature remains unchanged and the mixing ratio drops, the relative humidity will increase
Indicate whether the statement is true or false
What happens during movement along rotating fault blocks?
A. The corner of a block that is rotated down becomes a basin. B. The crust is thickened by the compression. C. The layers within the blocks rotate, but the blocks themselves do not. D. The layers and blocks rotate, but the faults do not rotate. E. None of these choices are correct.