Across
- 1. Matter with no fixed shape and no fixed volume
- 4. Change from liquid to solid
- 7. When particles spread out and move apart
- 8. Change from solid to liquid
- 12. When particles are forced closer together
- 14. Change from gas to liquid
- 15. Rapid change from liquid to gas throughout the liquid
- 16. Change directly from gas to solid
- 17. Change from liquid to gas at the surface
Down
- 2. Change directly from solid to gas
- 3. The amount of space something takes up
- 5. The ability to do work; increases when particles move faster
- 6. What a solid keeps but liquids and gases do not
- 9. Matter that takes the shape of its container but has a fixed volume
- 10. How tightly packed particles are in a substance
- 11. Matter with a fixed shape and fixed volume
- 13. Tiny units that make up all matter