Science Ch. 6 Key Terms

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Across
  1. 5. an upward fold in rock formed by compression of Earth's crust
  2. 6. a number that geologists assign to an earthquake based on the earthquake's size
  3. 7. stress that stretches rocks so that it becomes thinner in the middle
  4. 9. the force that opposes the motion of one surface as a moves across another surface
  5. 11. a force that acts on rock to change it's shape or volume
  6. 12. a rating of an earthquake's magnitude based on the size of the earthquake's seismic waves
  7. 16. a type of fault with the hanging wall slips downward; caused by tension in the crust
  8. 17. seismic waves that vibrate from side to side as well as up and down
  9. 21. stress that squeezes rock until it folds or breaks
  10. 22. a building mounted on bearings designed to absorb the energy of an earthquake
  11. 23. seismic waves that compress and expand the ground like an accordion
  12. 24. stress that pushes a mass of rock in two opposite directions
  13. 26. occurs when an earthquake's violent shaking suddenly turns loose, soft soil into liquid mud
  14. 28. a giant wave usually caused by an earthquake beneath the ocean floor
  15. 29. a large area of flat land elevated high above sea level
Down
  1. 1. a downward fold in rock formed by compression in Earth's crust
  2. 2. the shaking and trembling that results from the movement of rock beneath Earth's surface
  3. 3. the point on Earth's surface directly above an earthquake's focus
  4. 4. the block of rock that forms the upper half of a fault
  5. 8. an instrument that records and measures seismic waves
  6. 10. a rating system that estimates the total energy released by an earthquake
  7. 13. vibrations that travel through earth carrying the energy released during an earthquake
  8. 14. a type of seismic waves that forms when P waves and S waves reach the earth's surface
  9. 15. a type of fault where rocks on either side move past each other sideways with little up-or-down motion
  10. 17. the record of an earthquake's seismic waves produced by seismograph
  11. 18. the area beneath Earth's surface were rock that is under stress breaks, triggering an earthquake
  12. 19. a type of fault where the hanging wall slides upward; caused by compression in the crust
  13. 20. a scale that rates earthquakes according to their intensity and how much damage they causes at a particular place
  14. 25. the block of rock that forms the lower half of a fault
  15. 27. an earthquake that occurs after a larger earthquake in the same area