Inside Earth Unit Crossword

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Across
  1. 1. waves made by earthquakes
  2. 6. type of rock formed from volcanic activity
  3. 7. theory that states pieces of Earth's lithosphere are in slow, constant motion
  4. 9. type of boundary where plates are sliding past each other
  5. 10. layer of Earth composed of hot, soft rock
  6. 11. supercontinent from 250 million years ago
  7. 13. edge of a plate
  8. 16. device that detects earthquakes
  9. 17. type of heat transfer because of density differences in a fluid
  10. 18. location on the surface directly above the focus of an earthquake
  11. 19. size of crystals that form when minerals cool slowly
  12. 20. sections of Earth's crust that move with convection currents in the mantle
  13. 24. when oceanic crust sinks into the mantle at a convergent boundary
  14. 26. naturally occurring, inorganic, solid substance
  15. 28. type of boundary where plates are moving apart
  16. 29. person who first came up with the idea of continental drift
Down
  1. 2. type of rock formed from small pieces of other rocks
  2. 3. weak spot in the crust where magma comes to the surface
  3. 4. technology used to monitor plate motion
  4. 5. underwater mountain range, sight of sea-floor spreading
  5. 8. size of crystals that form when minerals cool quickly
  6. 12. type of curst made mostly of granite; make up continents
  7. 14. type of boundary where plates are moving together
  8. 15. molten rock below the surface
  9. 21. outer layer of Earth
  10. 22. how a mineral shines
  11. 23. innermost layer of Earth
  12. 25. "scratch-ability" of a mineral
  13. 27. breaking down rock into smaller pieces