Across
- 3. To change in shape
- 5. To move back and forth
- 7. The number of peaks and valleys in 1 second
- 10. Lowest level
- 11. Small portion of matter
- 15. Distance from the starting point a peak or valley
Down
- 1. A substance that lets waves travel through it
- 2. The transfer of energy from a vibrating object in waves that travel through matter
- 4. A substance that has mass and takes up space
- 6. An object that receives sound waves
- 8. When 2 things crash
- 9. The highness or lowness of a sound
- 12. to bounce back
- 13. Highest level
- 14. Vibrations that travel through the air