earth is like an onion it has layer

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Across
  1. 3. the ocean part that is on the crust
  2. 5. the farthest core from the crust
  3. 7. the closest core from the crust
Down
  1. 1. the part of the crust humans live on
  2. 2. the plates that cause natural disasters
  3. 4. the layer that humans live on
  4. 6. the layer that is closest to the innercore