Changes of state

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Across
  1. 4. boiling point
  2. 5. sublimation
  3. 9. state
  4. 14. to supply energy
  5. 15. to cool
  6. 17. solid (adj.)
  7. 18. to boil
  8. 22. liquid (adj.)
  9. 23. water
  10. 24. condensation
  11. 25. ice
  12. 26. snow
  13. 27. to increase
  14. 28. to liquefy
  15. 30. melting
Down
  1. 1. evaporation
  2. 2. desublimation
  3. 3. substance
  4. 6. particles
  5. 7. temperature
  6. 8. steam
  7. 10. pressure
  8. 11. to heat
  9. 12. drop
  10. 13. solidification
  11. 14. rain
  12. 16. cloud
  13. 19. to freeze
  14. 20. gas (adj.), gaseous
  15. 21. molecules
  16. 29. to melt