Unit 3 Lesson 4 Review

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Across
  1. 4. device used to measure seismic wave
  2. 6. Stress that squeezes rock
  3. 9. place on Earth's surface above the focus
  4. 14. Fastest seismic wave
  5. 15. Fault at a divergent boundary
  6. 16. Caused by an underwater earthquake
  7. 19. Seismic wave that does the most damage
Down
  1. 1. Seismic waves change _____ when they travel through materials with a different density
  2. 2. Stress that pulls rock apart
  3. 3. Fault at convergent boundary
  4. 5. Place inside the earth where an earthquake originates
  5. 7. Seismic wave that doesn't travel through liquid
  6. 8. Seismic wave that arrives at a seismograph station after a primary wave
  7. 10. Seismic waves transfer ______________
  8. 11. On the surface where rock breaks
  9. 12. Seismic wave that arrives at a seismograph station first
  10. 13. Fault at a transform boundary
  11. 17. Stress that pulls rock in opposite directions
  12. 18. Number of seismograph stations needed to find the epicenter