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Plate Motions
Topic Four, Lesson 1: Evidence of Plate Motions
| Question | Answer |
|---|---|
| in science, an idea that can be tested by experimentation or investigation | hypothesis |
| an undersea mountain chain where new ocean floor is produced; a divergent plate boundary under the ocean | mid-ocean ridge |
| process by which molten materials adds new ocean crust to the ocean floor | sea-floor spreading |
| process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary | subduction |
| an undersea valley that represents one of the deepest parts of the ocean | ocean trench |