Chapter 17 Review

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Across
  1. 2. The Study of Earth's magnetic record is known as
  2. 6. name of an underwater valley or deppresion
  3. 8. Large marsupial
  4. 9. The type of boundary that has plates going away from each other
  5. 11. places where plates slide horizontally past each other
  6. 12. name for underwater mountain ranges
  7. 14. Explains how new ocean crust is created at ocean ridges and destroyed in deep-sea trenches
  8. 15. Who Proposed the hypothesis of continental drift
Down
  1. 1. Plates come together at
  2. 3. States that Earth's crust and rigid upper mantle are broken into enormous slabs that slowly move overtime
  3. 4. Occurs when one tectonic plate descends beneath another
  4. 5. The transfer of thermal energy by the movement of heated matter is
  5. 7. Earths continents were once joined as a single landmass called
  6. 10. A map line connecting points that have the same age in
  7. 13. A process that occurs at convergent boundaries