Across
- 4. a change that cannot be reversed
- 8. anything that takes up space
- 9. increases the rate of a chemical reaction
- 10. the hardest state of matter
- 11. how a liquid becomes solid
Down
- 1. how water becomes gas
- 2. a change that can be reversed
- 3. a state of matter with no fixed shape
- 5. a state of matter which takes up most of earth
- 6. Bond lasting attraction between atoms
- 7. how ice becomes water
- 12. substance produced by a living organism