1. According to the traditional view of the origin of the ocean basins, which of the following is sufficient to move the continental plates?
a.Increases in sedimentation on ocean floors
b.Spreading of ocean trenches
c.Movement of mid-ocean ridges
d.Sinking of ocean basins
e.Differences in temperature under oceans and continents
2. It can be inferred from the passage that, of the following, the deepest sediments would be found in the
a.Indian Ocean
b.Black Sea
c.Mid-Atlantic
d.South Atlantic
e.Pacific
3. The author refers to a conveyor belt in line 13 in order to
a.illustrate the effects of convection in the mantle
b.show how temperature differences depend on the positions of the continents
c.demonstrate the linear nature of the Mid-Atlantic Ridge
d.describe the complicated motions made possible by back-coupling
e.account for the rising currents under certain midocean ridges
4. The author regards the traditional view of the origin of the oceans with
a.slight apprehension
b.absolute indifference
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