Across
- 1. solid to liquid
- 5. rubbing your hands together is an example
- 6. solid to gas
- 10. gas to liquid
- 11. water freezes at ____ degrees Celsius
- 12. liquid to gas
- 13. our biggest source of thermal energy
- 14. heat energy
Down
- 2. how hot or cold something is
- 3. the temperature at which a solid will melt and become a liquid
- 4. matter is made of this
- 7. the temperature at which a liquid will freeze and turn into a solid
- 8. the temperature at which a liquid will boil and turn into a gas
- 9. in this state, atoms are far apart and move freely
- 13. in this state, atoms are tightly packed together