Across
- 3. unit of loudness
- 5. string instrument
- 7. unit of amplitude
- 8. electrode connected to negative terminal
- 10. atoms with excess or deficit electrons
- 11. number of vibrations per second
- 12. irregular pattern of waves
- 15. percussion instrument
- 17. electrode connected to positive terminal
- 18. hears ultrasonic sound
- 19. positive ion
- 20. unit of frequency
Down
- 1. negative ion
- 2. measures earthquake
- 4. wind instrument
- 6. maximum displacement from mean position
- 9. dissociates into ions
- 13. detects charges on an object
- 14. same amplitude and same frequency
- 16. regular pattern of waves