Plate Techtonics Crossword

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Across
  1. 2. A boundary where two tectonic plates move away from each other
  2. 4. The ancient supercontinent that existed before the continents drifted apart
  3. 6. The process where one tectonic plate sinks beneath another into the mantle
  4. 7. A boundary where two tectonic plates collide or move toward each other
  5. 10. The rigid outer layer of the Earth consisting of the crust and upper mantle
Down
  1. 1. The circular movement of heat in the mantle that drives plate motion
  2. 3. A deep depression in the ocean floor formed at a subduction zone
  3. 5. The semi-fluid layer of the mantle upon which tectonic plates move
  4. 8. A break or crack in the Earth's crust where movement has occurred
  5. 9. A boundary where two plates slide horizontally past one another