Earths layers crossword

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Across
  1. 4. waves of energy
  2. 5. a solid ball of metal
  3. 6. second largest layer
  4. 9. solid outer section of the earth which includes the crust
Down
  1. 1. solid part of the upper mantel
  2. 2. a thin layer of crust that overlies the ocean basins
  3. 3. layer of rock which forms a continent
  4. 7. longest layer of the earth
  5. 8. the outer layer of the earth