Across
- 3. A form of energy that travels through a medium as vibrations.
- 4. A rapid back-and-forth movement.
- 5. A longitudinal wave caused by vibrating particles.
- 7. How high or low a sound is
- 8. The material through which sound travels (solid, liquid or gas).
- 9. A transfer of energy without transfer of matter.
- 10. A reflected sound wave.
- 11. The unit of frequency.
Down
- 1. A wave where particles vibrate parallel to the direction of energy transfer.
- 2. The number of vibrations per second.
- 4. How loud or quiet a sound is
- 6. The range of sound humans can hear (approximately 20 Hz – 20,000 Hz).