Plate Tectonics Crossword Puzzle

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Across
  1. 3. Thin, more dense than continental crust, subducting crust
  2. 5. A solid mass of iron and nickel
  3. 6. The theory that the continents are moving very slowly
  4. 8. A large, slowly moving body of snow and ice
  5. 10. Thickest layer of the Earth, part solid part liquid where convection currents are found
  6. 11. Waves produced by earthquakes that help us study the inner layers of earth
  7. 14. The solid, outer layer of the earth that consists of the crust and the rigid upper part of the mantle
  8. 17. Thicker, less dense crust
  9. 18. When one tectonic plates drives under another
  10. 19. When two plates come together
  11. 20. When two plates pull apart
Down
  1. 1. A semi-fluid layer of solid liquid rock
  2. 2. A single landmass that includes two or more continents
  3. 4. A break in the earths crust that moves
  4. 7. when two plates grind past each other
  5. 9. Extremely deep areas in the ocean that are created by a subducting plate
  6. 12. The movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another
  7. 13. How much mass there is in any given volume
  8. 15. The state of matter the earth's inner core is
  9. 16. A layer of molten iron and nickel that surrounds the inner core of Earth