Layers of the earth

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Across
  1. 2. Huge underwater mountain ranges
  2. 4. A ball of hot, solid metals
  3. 10. A boundary where plates push together
  4. 12. One of the metals found in the core
  5. 13. A gap in the middle of a mid ocean ridge
  6. 16. A boundary where plates scrape past each other
  7. 17. Earths outer layer
  8. 18. When one plate sinks beneath another it is called __________
  9. 19. The crust and the top part of the mantle
  10. 20. The man who introduced the theory of plate tectonics
Down
  1. 1. Huge plates in the earths lithosphere
  2. 3. A super continent that contained all of the current continents
  3. 5. Currents in the mantle that move the tectonic plates
  4. 6. What happens when earths magnetic poles switch
  5. 7. A place where new crust is formed
  6. 8. A theory that the continents move over time
  7. 9. Earths thickest layer
  8. 11. A boundary where plates move apart
  9. 14. Convergent, divergent and transform
  10. 15. A place where heated rock rises in plumes, often creating volcanoes