The Changing Earth

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Across
  1. 4. drift the theory that the continents are always moving
  2. 5. outermost layer of earth
  3. 7. thickest layer of the earth
  4. 9. a boundary in which the plates of the earth move towards each other
  5. 10. a boundary in which the plates of the earth move away from each other
Down
  1. 1. the earth's crust is broken into these, and they are always moving
  2. 2. a boundary in which the plates of the earth slide past each other
  3. 3. plays a role in creating earth's magnetic field
  4. 6. the layer of earth under the most pressure
  5. 8. the supercontinent that broke up 200 million years ago