Plate tectonics

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Across
  1. 3. The type of crust lying under the oceans of the world
  2. 5. the outermost layer of Earth.
  3. 6. A dropped zone where two tectonic plates are pulling apart
  4. 9. The innermost layer of the earth, an extremely hot, solid sphere of mostly iron and nickel
  5. 14. A raised area or mountain range under the oceans formed
  6. 15. separate
  7. 16. one plate going under another
  8. 17. It is the only liquid layer, a sea of mostly iron and nickel
  9. 18. continents were joined together in one large landmass
  10. 19. A layer of the earth's crust that lies under the seven continents
Down
  1. 1. the solid outer part of Earth that includes the crust and upper mantle
  2. 2. two tectonic plates grind past each other in a horizontal direction
  3. 4. The border between two tectonic plates
  4. 7. when an oceanic plate sinks underneath a
  5. 8. a slowly flowing layer of solid and melted rock formed by heat and pressure
  6. 10. collide
  7. 11. molten hot rock
  8. 12. melted rock on Earth’s surface
  9. 13. two plates slide against each other
  10. 16. The process that forms new ocean floor and oceanic crust