Crossword-Really Easy

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Across
  1. 2. Solid to gas
  2. 3. A Lesson
  3. 5. Particles move fast
  4. 7. A measuring item
  5. 9. The motion of diffusion
Down
  1. 1. A measurement
  2. 4. Particles leaving the surface of the liquid.
  3. 6. A substance that is liquid usaully
  4. 8. Water to solid