2. Sound Test Review

3. Vibrations Back and forth movements of matter are called

4. To make the pitch higher you will tighten the string because by tightening it you create greater tension and therefore higher frequency and pitch.. Let’s say you want to change the pitch of a string on your violin. If you want to make the pitch higher, will you tighten or loosen the string? Why?

5. Intensity The amount of energy in a sound wave is the

6. Rarefaction. The region in a sound wave where there are fewer particles of matter. Air pressure is lower and does not push the particles together.

7. NOISE POLLUTION Loud or unpleasant sounds in the environment are

8. ABSORPTION The disappearance of a sound wave into a surface is ____________________________.

9. The material through which the sound travels, and the temperature of the material What can change the speed of sound?

10. SOUND A form of energy that travels through matter as waves is ______________________.

11. TIMBRE The special sound produced by a musical instrument is called _____________________.

12. PITCH The highness or lowness of a sound is called __________________________.

13. Particles of matter What do the dots in the sound wave represent?

14. The Change in frequency as one object passes another. Example: When an ambulance is far away the siren does not sound loud, but as the ambulance comes closer, the frequency and pitch increase. As the ambulance moves away, the frequency and pitch decreases.. Briefly describe the Doppler Effect. Give an example of it.

15. COMPRESSION The region in a sound wave where the particles of matter are pushed closely together. Air pressure is greater creating sound. _________________________________.

16. Because air pressure is greater in a compression causing the matter to bounce more frequently, creating sound. Why are the dots closer together in compression, and further apart at rarefaction?

17. HERTZ. The measurement of a frequency of a sound wave is a ___________________________.

18. ECHO A sound wave that bounces from one surface to another is an _____________________.

19. The higher the pitch, the higher the frequency. The lower the pitch, the lower the frequency. Compare the two notes. Which one has a higher pitch? What does this tell you about the frequency of the note?

20. Because light travels faster than sound. When there is a thunderstorm outside, why do you see the lightning before you hear the thunder?

21. Print this page and label each red blank with the following terms: trough, rarefaction, amplitude, crest, frequency, compression, wave length (See next page for answers)

22. Answer Key crest wavelength rarefaction amplitude compression trough frequency

23. _________________ is the description of how loud or soft a sound is Noise Pollution Intensity Volume Decibels Correct Answer Volume

24. The human voice produces sounds in a wide range of ____________. Octaves Frequency Pitch Correct Answer Pitch

25. When you measure the loudness of a sound, you measure it in ________________. Noise Pollution Intensity Volume Decibels Correct Answer Decibels

26. In vocal groups, high voices may sing a C at 528 hertz. The low voices sing a C at 132 hertz – two ____________ lower Octaves Frequency Pitch Correct Answer Octaves

27. The _______________ of a sound is a measure of the sound’s energy. Noise Pollution Intensity Volume Decibels Correct Answer Intensity

28. Someone with long, thick vocal cords may sing tones at an even lower ____________, such as 110 hertz Octaves Frequency Pitch Correct Answer Frequency

29. Loud unpleasant sounds in the environment are called ___________________ Noise Pollution Intensity Volume Decibels Correct Answer Noise Pollution

30. What type of sound wave would a girl produce if she was screaming on the play ground? A. A large amplitude with a low frequency B. A small amplitude with a low frequency C. A large amplitude with a high frequency D. A small amplitude with a high frequency Correct Answer C

31. If someone yells, “Turn that down,” the person means that you should D. Decrease the frequency A. Increase the amplitude B. Decrease the amplitude C. Increase the frequency Correct Answer B

32. Which sound would have the highest decibel level? A. Traffic on the freeway B. A whisper D. Sarah talking C. A rocket blasting off Correct Answer C

33. The part of a sound wave where the particles are pushed together is called the … A. rarefaction B. compression C. crest D. trough Correct Answer B

34. Which would be the best flooring used to absorb sound? A. concrete floor B. a marble floor C. a wooden floor D. a carpeted floor Correct Answer D

35. Sound travels the fastest through __________ A. air on a hot day D. a metal bar C. air on a cold day B. a vacuum Correct Answer D

36. What would happen to the pitch of a sound if the frequency of the wave increased? A. The pitch would go up D. The pitch would go up and down C. The pitch would not change B. The pitch would go down Correct Answer A

37. You did it!!!!! I hope you have enjoyed the PowerPoint review. Go through the PowerPoint multiple times to ensure that you are prepared! I wish you the best on your quiz! Mr. M