earth

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Across
  1. 6. under the ocean
  2. 7. a solid ball
  3. 9. is 280km deep
  4. 10. thinnest
Down
  1. 1. is made from electric currents
  2. 2. its a type of crust
  3. 3. is the second layer
  4. 4. is 25 miles deep
  5. 5. is 440km deep
  6. 8. is made of melted iron and nickle