Geological Hazards

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Across
  1. 4. The rigid outer part of the earth, consisting of the crust and upper mantle.
  2. 6. What defines layers according to their physical properties.
  3. 9. Point within the earth where an earthquake rupture starts.
  4. 10. Denser, thinner, younger crust.
  5. 11. The ......... discontinuity is the boundary between the crust and the mantle.
  6. 13. Method used to locate the epicenter of an earthquake.
  7. 14. Created the first scientific map of the entire ocean floor.
  8. 16. Lower part of the mantle.
Down
  1. 1. Continuous flow that occurs in a fluid because of differences in density.
  2. 2. Upper part of the mantle.
  3. 3. Thicker and older crust.
  4. 5. The hypothetical landmass that existed when all continents were joined.
  5. 7. What defines layers according to their chemical properties.
  6. 8. Originator of the continental drift hypothesis.
  7. 12. The zone of earthquakes and volcanoes surrounding the Pacific Ocean.
  8. 15. Found evidence of sea-floor spreading.