Across
- 3. Heating up or cooling down molecules.
- 6. light bounces of smooth surfaces.
- 7. Energy of motion.
- 8. Energy of vibrations
- 9. Sound energy must travel in___________.
Down
- 1. Light travels in a ___________ line.
- 2. The bending of light from one medium to another.
- 3. A fan uses electrical, mechanical, and ________ energy.
- 4. Energy that we can detect with our eyes.
- 5. Energy of electrical charge particles.
- 10. Light can travel through __________ space.