Plate Tectonics Crossword Puzzle

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