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3 Written Questions

3 Multiple Choice Questions

  1. a process that continually adds new material to the ocean floor
  2. Several types of evidence supported the theory of sea floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves.
  3. 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 True/False Questions

  1. deep-ocean trenchesdeep underwater canyons

          

  2. What happens at deep-ocean trenches?In a process taking tens of millions of years, part of the ocean floor sinks back into the mantle at deep-ocean trenches.

          

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