Across
- 3. it travels faster in and is less dense
- 4. a word that describes the size of a wave
- 7. The matter that supports the sound
- 9. unit of sound waves
- 11. unit of frequency
- 14. sound waves are ___ waves
- 15. they can travel through a vacuum
- 16. a form of energy
- 17. also known as the speed of a wave
- 20. a sound with a frequency of less than 20Hz.
Down
- 1. it travels slowest in
- 2. a word that is defined higher or lower sound
- 3. waves travel at 343 m/s through the air
- 5. sound travels 1,480 MPs in these
- 6. sound frequency humans can handle and hear
- 8. a sound with a frequency more than 20,000Hz.
- 10. it is sometimes referred to as pitch
- 12. it is at the bottom of a sound wave
- 13. sounds are made from these
- 17. sound waves can not travel through this
- 18. the intensity at the threshold of hearing.
- 19. means the quality of a sound