Earth crossword puzzle by Alwyn

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Across
  1. 4. A hot liquid that shoots out of a volcano.
  2. 5. A mountain or hill that has a hole going into the mantle for hot liquid to come out of.
  3. 6. The third layer of the earth.
Down
  1. 1. The very middle layer of the earth.
  2. 2. The second layer of the earth.
  3. 3. This hot liquid is formed in the mantle.
  4. 7. The layer that people live on.