Across
- 3. Something is vibrating.
- 4. Cannot speak.
- 6. Sound travels as a ___________?
- 8. Unit of volume.
- 11. Why we can't hear the Sun.
- 12. Pitch too high for humans to hear.
- 15. Instrument with strings.
Down
- 1. Sounds I don't like.
- 2. Low pitch instrument.
- 5. How fast is it vibrating?
- 6. High pitch instrument.
- 7. Cannot hear.
- 9. They navigate using sound.
- 10. Moving back and forth.
- 13. High or low.
- 14. Unit of frequency