Layers of Earth Crossword

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Across
  1. 2. 4th layer
  2. 3. 2nd layer
  3. 6. movement of heat
  4. 7. study of movement
  5. 8. 3nd layer
  6. 9. 1st layer
Down
  1. 1. ___ plates
  2. 4. majority of inner and outer core
  3. 5. majority of mantle material
  4. 6. cause tectonic plate movement