Across
- 2. to travel through. Cannot travel through the
- 3. To bounce back.
- 5. The ability to do work or cause change.
- 8. An energy that travels in waves and need a
- 9. of space.
- 10. Material through which waves travels.
- 12. A rapid back and forth movement.
- 13. To take in or soak up.
Down
- 1. The highness or lowness of a sound.
- 4. The number of vibrations per second.
- 6. A reflected sound wave.
- 7. The loudness of sound.
- 11. To send out, to give forth.