Earthquakes and Volcanoes

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Across
  1. 2. runny lava with little or no cinder
  2. 3. the 2 layers of the earth's crust that move, float and sometimes fracture
  3. 8. fountain of lava that runs down the sides of volcano
  4. 10. the slowest moving and most destructive waves; can move back and forth in a zigzag pattern; fastest moving land waves
  5. 14. violent volcano with loud explosion that sends lava, ash, cinders and gas into the air
  6. 15. produces a pyroclastic flow
  7. 16. vibrations that flow out from the beginning point of an earthquake
  8. 20. a high speed flow of very hot gases and dust
  9. 21. most powerful type of volcano where lava is spewed and gas, ash and debris are blown into the atmosphere
  10. 22. seismic waves that occur beneath the surface of the earth
  11. 23. theory that all land was in one giant piece and slowly drifted apart
  12. 25. fastest moving; travel in a straight path by a push and pull motion; these waves move back and forth
Down
  1. 1. where 2 tectonic plates separate
  2. 4. a machine that detects, times, and measures the movement of the earth
  3. 5. records of the movements of the earth
  4. 6. beginning point of an earthquake
  5. 7. where 2 tectonic plates collide
  6. 9. scientists who studies the movement of the earth
  7. 11. a region of the earth's crust where tectonic plates meet
  8. 12. rocks moving horizontally past each other
  9. 13. rocks push together until a section of rocks moves upward
  10. 17. move more slowly; move in a up and down zigzag pattern; causes the particles in the rock to vibrate to the direction in which the wave is moving
  11. 18. the point on the surface of the earth directly above the focus
  12. 19. rocks moving apart
  13. 24. breaks in the earth's surface along which rocks can move