Plate Tectonics Vocabulary

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Across
  1. 6. Where two plates spread apart from each other.
  2. 7. The idea that the earth's crust is made up of large pieces, called plates, that have moved over time.
  3. 10. The idea the continents were once joined together to form a single large continent.
  4. 12. Where two plates collide.
  5. 13. The process of one plate moving below another plate.
Down
  1. 1. Where two plates slide past each other.
  2. 2. The idea that the continents were once joined in a single land mass that eventually broke apart into pieces that slowly moved away from each other.
  3. 3. A process that occurs at mid-ocean ridges, where oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
  4. 4. A long, steep valley formed when two parallel rifts form in the Earth's crust and the land between them sinks.
  5. 5. The process where when new rock is formed at the mid-ocean ridge, it is affected by the polarity of the earth's magnetic field causing a pattern of parallel magnetic "strips".
  6. 8. A deep ditch; found at a subduction zone.
  7. 9. A huge crack in the crust where the hot mantle pushed upward.
  8. 11. Is a fixed area of the mantle that is so hot that magma rises through the lithosphere above it.