Across
- 3. place where sound can't travel
- 5. a wave that has peaks and dips
- 6. energy that can travel in space
- 10. devices that use light from the sun to produce electricity
- 11. the substance through which wave travels
- 12. a wave that transfers energy through materials
Down
- 1. substance where sound travels the slowest
- 2. energy found on the sun
- 4. energy found in fireworks while at rest
- 7. internal energy caused by the motion of the particles
- 8. sound travels through tiny_____
- 9. substance where sound travels the fastest
- 10. energy that is produced by the vibration of particles