EARTHQUAKES AND VOLCANOES

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Across
  1. 3. A shaking or trembling of the earth that is volcanic or tectonic in origin
  2. 4. Rocks that make up over 90 percent of the earth's crust
  3. 5. Outermost layer of the earth
  4. 9. A circular depression caused by volcanic activity
  5. 11. A sudden event bringing great destruction
  6. 14. An instrument that records the earth's vibrations
  7. 15. What are huge slow moving pieces of the earth's crust and upper mantle
  8. 16. Hot, melted rock that forms deep inside the earth
  9. 17. Energy that travels through the earth
  10. 18. What comes out of a volcano
  11. 19. Fracture where blocks of crust on either side move
Down
  1. 1. Concerning an earthquake or earth vibration
  2. 2. What determines the strength of an earthquake
  3. 3. Large pieces that make up the earth's crust and upper mantle
  4. 6. An earthquake that happens after the main earthquake
  5. 7. Measures the energy released by an earthquake
  6. 8. Horizontal fault where the areas of rock slide past one another
  7. 10. Large ocean wave caused by an underwater earthquake or volcanic eruption
  8. 11. Harm resulting from injury to person or property
  9. 12. Location of 1994 earthquake that measured 6.7 on the Richter scale and killed 57 people
  10. 13. Place or opening in the earth's crust from which rock and gases reach the surface