Earth Science Crossword

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Across
  1. 2. The thin outer layer of the Earth
  2. 5. Plates slide past each other - causes earthquakes
  3. 7. The center of the Earth. It's very hot and made of iron.
  4. 8. The layer of thick magma that the plates float on
  5. 9. The force that pulls everything toward the center of the Earth.
Down
  1. 1. Plates move away from each other - causes seafloor spreading
  2. 3. Is ocean crust thinner or thicker than continental crust?
  3. 4. Plates move toward each other - causes subduction
  4. 6. The longest mountain chain in the world