Unit 4:The Dynamic Earth

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Across
  1. 2. pieces that make up the earth's crust
  2. 5. where two plates are moving away from each other and new crust is forming from magma
  3. 6. when the earths's magnetic field reverses itself
  4. 8. supercontinent that existed 200 million years ago
  5. 10. process by which new ocean crust forms along mid-ocean ridges and pushes old crust away
Down
  1. 1. theory that the continents slowly moved and are still moving to their current locations
  2. 3. a mountain chain on the ocean floor
  3. 4. the outer part of the earth, consisting of the crust and upper mantle
  4. 7. distance from the ocean surface to the ocean's floor
  5. 9. 7 great masses of land