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Plate Tectonics: Section 4 / Key Concepts & Terms Test

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3 Written Questions

3 Multiple Choice Questions

  1. In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as new crust is added. As a result, the ocean floors move like conveyor belts, carrying the continents along with them.
  2. deep underwater canyons
  3. a process that continually adds new material to the ocean floor

2 True/False Questions

  1. What happens at deep-ocean trenches?deep underwater canyons

          

  2. subductionthe process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle

          

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