Across
- 3. A system where anything can get in or out.
- 4. A state of matter that has no definite shape but has definite volume.
- 5. When two particles collide and transfer energy.
- 7. As the average kinetic energy of particles increase, the temperature will ______.
- 10. The change of state from a solid to a liquid.
- 12. When light passes through an object.
- 16. The measure of the average energy of motion of particles in a substance.
- 18. The change of state from a liquid to a solid.
- 19. A material that reduces the transfer of heat energy.
Down
- 1. The transfer of heat energy from one object to another by direct contact.
- 2. A smallest part of a substance.
- 6. When an object is hot, the particles move _______.
- 8. The change of state from gas to liquid.
- 9. A state of matter that has definite shape and definite volume.
- 11. A state of matter that has no definite shape and no definite volume.
- 13. The change of state from liquid to gas.
- 14. Anything that has mass and takes up space.
- 15. When light bounces off an object.
- 17. A system where nothing can get in or out.