Across
- 1. It may be noble or natural
- 4. Go directly from solid to gas
- 7. Has a fixed shape and volume
- 9. Change from solid to liquid
- 12. Amount of matter
- 13. Energy that flows from warm to cool
- 15. Capacity to do work
- 16. Flows but keeps its volume
Down
- 2. Short for “digits that matter” in measurements
- 3. Change from gas to liquid
- 5. Change from liquid to gas
- 6. Fourth state of matter
- 8. Mass per unit volume
- 9. Like lava or hot metal
- 10. What a chemist calculates
- 11. SI unit of energy
- 14. Change from liquid to solid