Unit 2.1 Vocabulary

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Across
  1. 2. an undersea mountain chain where new ocean floor is produced at a divergent plate boundary
  2. 4. long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries
  3. 7. the brittle upper portion of the mantle and the crust
  4. 11. When two tectonic plates come together and collide
  5. 13. a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other
  6. 14. created where two or more of Earth's tectonic plates are pushed together
  7. 15. a layer of rock that forms the upper mantle, the layer of the Earth between the crust and the core.
Down
  1. 1. the theory of a "supercontinent" existing in which all of our current landforms originated from
  2. 3. places where tectonic plates slide sideways past each other
  3. 5. when an oceanic plate runs into a continental plate and slides beneath it
  4. 6. a flat, low-lying valley that forms at a geographical crack or separation
  5. 8. occurs when two tectonic plates move away from each other
  6. 9. the theory of all continents drifting apart from pangaea
  7. 10. a long crack in the surface of the earth caused by a divergent boundary
  8. 12. steep depressions in the deepest parts of the ocean caused by a converge-subduct boundary