Across
- 3. how tightly or loosely packed a substance is
- 6. light bouncing off a substance
- 8. a substance containing 2 or more substances easily seperated
- 9. the ability to cause change in matter
- 11. anything that has mass and takes up space
- 12. a liquid in which the substances are evenly mixed
Down
- 1. an energy of vibrations
- 2. a system with many parts
- 4. thermal energy
- 5. a material that blocks energy from passing through it
- 6. the bending of light
- 7. a material that allows energy to pass through it
- 10. a smooth steady movement