planets

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Across
  1. 3. the dwarf planet
  2. 4. ice planet
  3. 6. hydrogen and helium
  4. 8. iron
Down
  1. 1. hydrogen and helium
  2. 2. iron core and a rocky mantle
  3. 5. ice planet
  4. 7. a place where we live
  5. 8. oxygen and iron silicon and magnesium