Plants, Ecosystems, Earth Review

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Across
  1. 3. thinnest layer of earth
  2. 5. plates slide beside each other
  3. 6. plates pull apart
Down
  1. 1. molten iron and nickel
  2. 2. thickest layer of earth
  3. 4. plates push against each other
  4. 7. solid iron and nickel