Plate Tectonics

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Across
  1. 3. When a plate slides under another, ___ happens
  2. 4. When plates separate, they ___.
  3. 6. When plates collide, they ___.
  4. 7. Underwater valley made by plates spreading apart
  5. 8. The last name of the scientist who proved continental drift
  6. 10. When plates slide past each other, they ___.
Down
  1. 1. Movement in the biggest layer
  2. 2. The last name of the scientist who theorized continental drift
  3. 5. The thin, least dense layer of the earth
  4. 9. The biggest layer of the earth