Tsunami, Earthquake, Volcano, Tectonic Plates

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Across
  1. 3. Boundary where two plates move apart from each other
  2. 6. The rigid outer part of the Earth
  3. 10. Volcanic material released into the air during eruptions
  4. 12. Scientific study of earthquakes
  5. 15. Currents in the mantle that drive plate movement
  6. 16. A large oceanic plate in the Pacific Ocean
  7. 17. Area where magma melts through the crust
  8. 19. The point on the Earth's surface directly above the focus
  9. 21. Smaller quake following the main one
  10. 23. Can be formed by volcanic activity under oceans
  11. 26. Superheated mixture of gases and ash from volcanoes
  12. 30. Seismic wave that compresses and expands material in the direction of propagation
  13. 32. Relating to the movement of Earth's plates
  14. 33. The release of lava, ash, and gases from a volcano
  15. 34. Plate boundary where plates slide against each other
  16. 36. Scale used to measure the magnitude of earthquakes
  17. 37. Long crack in the Earth's surface where lava can escape
  18. 38. Earth's central and hottest layer
  19. 39. ______ waves are waves from the earthquake
Down
  1. 1. The most active volcanic region on Earth: Ring of ____
  2. 2. A huge tidal wave caused by underwater disasters
  3. 4. The study of Earth's structure
  4. 5. The outermost layer of the Earth
  5. 7. Seismic wave type that moves particles perpendicular to the direction of wave travel
  6. 8. Molten rock beneath the Earth's surface
  7. 9. An opening in the Earth's surface that erupt lava
  8. 11. A break in the Earth's crust
  9. 13. Sudden movement of the Earth's crust
  10. 14. A deep crack formed by diverging plates
  11. 15. Bowl-shaped opening at the top of a volcano
  12. 18. A small or slight earthquake
  13. 20. Material released with lava during an eruption
  14. 22. Plate boundary where one plate slides under another
  15. 24. An instrument that detects ground motion
  16. 25. Slow movement of continents
  17. 26. Elevated flat land formed by volcanic activity
  18. 27. A large depression formed when a volcano collapses
  19. 28. Surface trace of a geological fault
  20. 29. Underground point where an earthquake starts
  21. 31. Earth's core is made mostly of this metal
  22. 35. Layer of hot, molten rock beneath the crust
  23. 36. Lava that has cooled and solidified