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22 questions
5. How much of Earth’s surface is continent?
33% (or 1/3)
67% (or 2/3)
80%
20%
6. How much of Earth’s surface is ocean?
33% (or 1/3)
80%
67% (or 2/3)
20%
17. What causes plate tectonics?
Plate tectonics
Seafloor spreading
Convection currents
Mid-Atlantic ridge
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