Plate Tectonics

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Across
  1. 2. primary waves that can pass through solid and liquid
  2. 4. The driving force behind continental movement
  3. 5. The connected area of the crust and upper mantle
  4. 6. The hottest layer of the Earth
  5. 7. A liquid layer of the Earth made of iron and nickel
  6. 8. The study of earthquakes
  7. 9. The thinnest, solid layer of the Earth
  8. 10. The thickest layer of the Earth
Down
  1. 1. The supercontinent made of all continents together
  2. 3. The idea that continents move
  3. 8. secondary waves that cannot pass through liquid