1. Science 8-Chapter 4—Lesson 1 Quiz
Sound

2. the number of wavelengths that pass a given point in one second

3. frequency
the number of wavelengths that pass a given point in one second

4. SI unit of frequency

5. hertz
SI unit of frequency

6. a thin membrane that stretches across the ear canal

7. eardrum
a thin membrane that stretches across the ear canal

8. the part of a sound wave where the molecules are close together

9. compression
the part of a sound wave where the molecules are close together

10. a wave in which particles in a material move along the same direction that the wave travels

11. longitudinal wave Longitudinal wave demonstration
a wave in which particles in a material move along the same direction that the wave travels
Longitudinal wave demonstration

12. a longitudinal wave that can travel through matter

13. sound wave
a longitudinal wave that can travel through matter

14. the distance between a point on a wave and the nearest point just like it

15. wavelength
the distance between a point on a wave and the nearest point just like it

16. the part of the sound wave where the molecules are farther apart

17. rarefaction
the part of the sound wave where the molecules are farther apart

18. a system that uses sound waves to locate underwater objects

19. sonar
a system that uses sound waves to locate underwater objects

20. the perception of how high or low a sound seems

21. pitch
the perception of how high or low a sound seems
Pitch

22. a reflected sound wave

23. echo
a reflected sound wave
Echo

24. a structure in the inner ear

25. cochlea
a structure in the inner ear

26. the human sensation of how much energy a sound wave carries

27. loudness the human sensation of how much energy a sound wave carries

28. a measure of the energy in a sound wave

29. amplitude
a measure of the energy in a sound wave

30. the measuring unit of the loudness of sounds

31. decibel
the measuring unit of the loudness of sounds