Across
- 2. the amount of space taken up by a substance
- 4. movement energy
- 6. a property of a substance observed during a chemical reaction
- 9. the smallest form of a particle
- 10. free-flowing substances of fixed volume
- 11. an increase in volume caused by an increase in heat
- 12. amount of matter
- 13. explanation of ideas
- 15. a substance changing from a solid to a liquid
- 16. the temperature at which a solid melts
- 19. things about matter which can be measured and observed
Down
- 1. a substance changing from a solid to a gas
- 3. the temperature at which a liquid boils and turns to gas
- 5. a substance changing from gas to liquid
- 7. liquid turning to gas
- 8. particles that are of fixed volume and stable
- 11. chemical substance in its simplest form
- 12. any substance that has mass and takes up space
- 14. particles moving from high to low concentration
- 17. substances of unfixed volume which can easily change shape
- 18. a substance changing from a liquid to a solid