Across
- 6. firm and stable shape
- 8. anything that has both mass and volume
- 10. a physical change
- 12. the movement of heat
- 13. has no fixed shape or volume
- 14. energy that comes from a source
- 15. flows freely and is of constant volume
- 17. energy with moving electric charges
- 18. particles that are always moving
- 19. energy of motion
Down
- 1. temperature at which the pressure upon a liquid
- 2. a substance that is made up of one kind of particle
- 3. how heavy and object is
- 4. how hot of cold something is
- 5. how much space an object takes up
- 7. when a solid melts
- 9. a substances that transforms into a new one
- 11. how much matter is in an object
- 16. the use of nuclear reactions to produce energy
- 20. the temperature difference between objects