Earth and space pages 46-54

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Across
  1. 8. Builds on research in a station started in Parkfield,Cali(five words)
  2. 9. Measures an earthquake by damage and observations(three words)
  3. 12. _______ are added to structures to absorb some of the seismic energy(two words)
  4. 16. In ___________ system the building rests on isolators that absorbs seismic energy(two words)
  5. 17. How many people were killed in the Mt St Helens eruption
Down
  1. 1. Gives a waring when earthquake waves are detected (two words)
  2. 2. Measures an earthquake by the energy that the earthquake makes(two words)
  3. 3. an opening in the earths surface that which the ejecta passes through
  4. 4. Measures an earthquake by the size of its source(Three Words)
  5. 5. a large channel in a volcano in which ejecta pass through
  6. 6. Provides us with info of the earths interior(two words)
  7. 7. Building constructed on ______ is called fixed based systems
  8. 10. what you should not do during a earthquake
  9. 11. What volcano erupted at 8:32am(three words)
  10. 13. Where a devastating 1989 earthquake happened
  11. 14. Molten rock
  12. 15. It is presently __________ to predict an earthquake