Unit 30 Review Questions

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. At the time that Alfred Wegener was alive, what evidence supporting his continental drift hypothesis was not yet known?

The relative ages of oceanic crust correct incorrect

The existence of the same fossils on both sides of the Atlantic Ocean correct incorrect

The existence of similar plant and animal species on both sides of the Atlantic Ocean correct incorrect

Similar rock formations on different continents correct incorrect

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. Seafloor spreading:

results in the oldest oceanic rocks being adjacent to midoceanic ridges correct incorrect

was known to geologists in the early twentieth century correct incorrect

often begins as a rift in a continental landmass correct incorrect

occurs in the Pacific basin, but nowhere else correct incorrect

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. Convergent boundaries bordering the Pacific Plate have:

many earthquakes, but few volcanoes correct incorrect

many volcanoes, but few earthquakes correct incorrect

both many earthquakes and many volcanoes correct incorrect

both few earthquakes and few volcanoes correct incorrect

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. According to the theory of plate tectonics, the youngest crust on the planet is typically found at:

the top of the asthenosphere correct incorrect

oceanic-continental convergent plate boundaries correct incorrect

transform plate boundaries correct incorrect

midocean ridges correct incorrect

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. Volcanic island arcs are the result of subduction at:

oceanic-oceanic convergent plate boundaries correct incorrect

oceanic-continental convergent plate boundaries correct incorrect

continental-continental convergent plate boundaries correct incorrect

divergent plate boundaries correct incorrect

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. The earthquakes along California's San Andreas Fault are the result of movement along a(n)

continental-continental convergent plate boundary correct incorrect

transform plate boundary correct incorrect

divergent plate boundary correct incorrect

oceanic-continental convergent plate boundary correct incorrect