Across
- 4. Area where particles are spread apart
- 9. Area where particles are close together
- 10. Unit used to measure loudness
- 11. How often a wave repeats
- 12. A repeating pattern that carries energy
Down
- 1. Back-and-forth motion that makes sound
- 2. A reflected sound
- 3. Object that detects sound
- 5. Height of a wave related to loudness
- 6. The material sound travels through
- 7. How high or low a sound is
- 8. Object that produces sound