science

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Across
  1. 7. brown
  2. 8. reversible
  3. 9. disappearing
  4. 11. over date
  5. 12. fire
Down
  1. 1. wood
  2. 2. eat
  3. 3. irreversible
  4. 4. degrees celsius
  5. 5. ice-water
  6. 6. cold
  7. 10. paper