Earth's Structure & Plate Tectonics Crossword Puzzle

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Across
  1. 3. semi-fluid layer of Earth that causes tectonic plates to move from is plasticity
  2. 6. forms when tectonic plates collide
  3. 7. where two plates move away from each other
  4. 10. site where seafloor spreading occurs and new crust forms
  5. 14. a break in the Earth's surface
  6. 16. volcanic areas away from plate boundaries that are stationary heat sources in mantle, which form volcanic chains as plates move
  7. 17. movement as a result of differing temperatures
  8. 18. forms on a continental plate when two continental plates separate
  9. 19. forms on a oceanic plate when an oceanic plate and a continental plate collide
Down
  1. 1. formed by Earth's core and protects Earth from solar radiation
  2. 2. plates slide past each other horizontally
  3. 4. where two plates collide
  4. 5. largest layer; magma circulates in convection currents
  5. 8. sphere of solid iron and nickel at the center of Earth
  6. 9. outermost, rigid physical layer of the Earth; divided into plates
  7. 11. Earth's outermost layer
  8. 12. shell of hot, liquid metal
  9. 13. shaking of Earth's surface
  10. 15. forms on a continental plate when an oceanic plate and a continental plate collide