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plate motion
| Term | Definition |
|---|---|
| mantle | the layer of soft, soild rock underneath earth's plates |
| convergent | moving towards the same place |
| mid-ocean floor | |
| trench | a long, deep indentation in the ocean floor formed when two plates move together |
| divergent | moving apart in different directions |
| volcanic activity | any of the many process (such as eruptions and lava flows) in which gas, and ash are pushed out on the surface of Earth |
| analyze | to examine in detail for purpose |