The main objection to Wegner's theory of Continental Drift was ________
A) clear evidence of land bridges, like the one connecting Alaska and eastern Russia, clearly exist and explain most of Wegner's observations without Continental Drift.
B) Wegner's gravitational mechanism for the movement of continents would also stop the Earth's rotation, which has not happened.
C) the tracks of the moving continents could not be identified on the ocean floor.
D) the ocean basins show no evidence of opening and closing.
B
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Describe the theory of plate tectonics
What will be an ideal response?
What line or region best corresponds with the location of "C" climates?
A. equator, high elevations B. coastal locations, midlatitudes C. continental interiors, northern hemisphere D. high latitudes
The most serious threat to coral reefs are ________
A) floods B) humans C) hurricanes D) sea stars E) tsunami
Potentially unstable coastlines may be identified by
A. a large amount of driftwood on the beach. B. the width of the coastline. C. the absence of shoreline-protection structures. D. comparison of recent and older maps or aerial photographs of the area, if available from sources such as county planning office, detailed maps compiled earlier indicating the appearance of the coastline.