little alchemy

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Across
  1. 2. fire + sand
  2. 3. fire + stone
  3. 4. grass + plant
  4. 5. lava + air
  5. 7. earth + E=cm2
  6. 9. earth + earth
Down
  1. 1. fire + earth
  2. 2. plant + glass
  3. 5. air + stone
  4. 6. grass + water
  5. 8. plant + water