Plate Tectonics and Seafloor Spreading

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Across
  1. 3. Consists of the Earth's crust and upper mantle
  2. 8. Boundary that occurs when plates slide by each other and create faults or earthquakes
  3. 9. An underwater mountain system
  4. 12. The theory that the crust is divided into large plates called tectonic plates that slowly move on top of the mantle
  5. 15. A place where two tectonic plates move toward each other
Down
  1. 1. The name of the supercontinent
  2. 2. Evidence that proves continents were once connected
  3. 4. When new ocean crust forms at the ridges
  4. 5. Melted rock material beneath Earth's surface
  5. 6. The thin, solid, outermost layer of Earth
  6. 7. A place where two tectonic plates move away from each other
  7. 10. The solid layer of Earth between the crust and the core
  8. 11. A denser plate is pushed beneath a less dense plate when they converge
  9. 13. Where old oceanic crust goes that is destroyed
  10. 14. The denser crust