Plate Tectonics

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Across
  1. 2. Plate boundary where two plates slip past each other
  2. 4. Famous string of volcanoes
  3. 6. A molten mixture of gases, water, and rock-forming substances from the mantle
  4. 9. Crust that is on the land under mountains
  5. 13. Valley where the sea floor subducts back into the mantle
  6. 14. The process of continually adding new material to the ocean floor
  7. 15. Liquid magma at the surface
  8. 17. A process in which one plate goes under another at a convergent boundary
  9. 19. The stress force that pulls on the crust, and thins rock in the middle
  10. 20. Underwater mountain chain where sea floors are renewed
Down
  1. 1. Plate boundary where two plates collide
  2. 3. Crust under the ocean
  3. 5. Breaks in Earth's crust where rocks have slipped past each other
  4. 7. A curved chain of volcanoes located at the edge of a plate
  5. 8. Forms where pieces of Earths crust separate
  6. 10. The stress force that squeezes the crust, forming mountains
  7. 11. A vent on the surface where magma escapes from the mantle
  8. 12. The outer layer of Earth
  9. 16. An area where magma melts through the crust above it
  10. 18. Plate boundary where two plates move away from each other