Across
- 5. The substance through which waves travel
- 6. Another name for solar cells is _____ cells
- 9. What is the spectrum on which light waves are measured
- 10. What energy cannot travel through space
- 11. Can energy be transferred through light
- 12. What do all sounds have to start with
Down
- 1. The air is made up of ____ that help sound travel
- 2. If sounds are very loud, we can ____ the vibrations
- 3. The Sun's rays referred to as?
- 4. Sound and light energy are both what kind of energy
- 7. Much like sound, light also travels in ______
- 8. The devices that collect sunlight and transform that energy into electricity are called solar