1. Chapter 12 Review Mr. Hauser

2. Rules of the Game Working in TEAMS, you will be asked to answer questions from the assigned chapters. You have 30 seconds to write the answer down on the dry erase board. When the teacher says TIME’S UP, a team leader will stand up and show the teacher their answer.

3. Rules (Continued) Each correct answer is worth one point, unless otherwise stated. Teams can lose points for inappropriate conduct, comments, or cheating. The team with the most points at the end of the game wins!

4. Question 1 The very top part of a wave is called the ___________.

5. crest

6. Question 2 The distance between equilibrium and crest of a wave is called the ______. A)frequency B)wavelength C)amplitude D)period E)speed

7. C) amplitude

8. Question 3 The distance from one point on a wave to the same point on the next consecutive wave is called __________. A)frequency B)wavelength C)amplitude D)period E)speed

9. B) Wavelength

10. Question 4 The mathematical name for the shape of a wave is called a __________ wave.

11. sine

12. Question 5 Since sound cannot travel in a vacuum it is called a(n)… A) mechanical wave B) non-mechanical wave C) transverse wave D) Electromagnetic wave

13. A) Mechanical wave

14. Question 6 What are the metric units used to measure frequency?

15. Hertz

16. Question 7 The faster the sound moves through the air, … A)the colder the air must be. B)the warmer the air must be. C)the dryer the air must be. D)the higher frequency sound it must be.

17. B) the warmer the air must be

18. Question 8 What is the range of human hearing? A. 5 Hz-5,000 Hz B. 10 Hz - 10,000 Hz C. 20 Hz - 20,000 Hz D. 30 Hz - 30,000 Hz E. 40 Hz - 40,000 Hz

19. C) 20 Hz - 20,000 Hz

20. Question 9 What is the type of wave that vibrates its medium perpendicular to its direction of travel? Hint: light, x- rays, radio waves fall into this category

21. Transverse waves

22. Question 10 What is the other name for a longitudinal wave?

23. Compression wave

24. Question 11 In a longitudinal wave the area between compressions is called…

25. rarefaction

26. Question 12 What is the symbol used for wavelength?

27. Lambda ( )

28. Question 13 Which two factors affect the speed of sound in air? A)frequency and period B)amplitude and wavelength C)air temperature and humidity D)wavelength and elasticity

29. C) Air temperature and humidity

30. Question 14 The pitch of a sound depends on which of these? A.wavelength B.amplitude C.intensity D.loudness E.frequency

31. E) frequency

32. Question 15 Sound travels fastest in… A)solids. B)liquids. C)gases. D)a vacuum.

33. A) solids

34. Question 16 When a sound strikes a barrier and bounces back to the listener he or she perceives an ________.

35. echo

36. Question 17 When sound waves bend due to a difference in air temperature it is called… A)reflection B)reverberation C)echoing D)refraction

38. Question 18 Sound waves that are beyond the frequency range of human hearing are called _____________.

39. Ultrasonic

40. Question 19 When one vibrating object makes contact with another causing the second one to vibrate it has made… A)an echo. B)reverberation. C)a forced vibration. D)the Doppler Effect.

41. C) Forced Vibration

42. Loudness of sound is measured in units called... Question 20

43. Decibels

44. The special frequency an object has that depends on its elasticity and shape is referred to as... Question 21

45. Natural Frequency

46. When an object receives a sympathetic vibration from an outside source that matches its natural frequency and the object vibrates with a large amplitude _____________ is occurring. Question 22

47. Resonance

48. The Tacoma Narrows bridge that was resonated by the wind and literally shook itself apart was located in what state? Question 23

49. Washington

50. When two waves occupy the same space at the same time they __________ with one another. Question 24

51. Interfere

52. When two waves interfere that are in phase and the resulting wave that gets created has a larger amplitude __________ interfence has occured. Question 25

53. Constructive

54. The apparent change in frequency of a wave due to the motion of a source or observer is called… Question 26

55. The Doppler Effect

56. If you can travel faster than the speed of sound, observers would hear a ________ ________ after you pass by. Question 27

57. sonic boom

58. If you travel at twice the speed of sound, you are traveling at _______ 2. Question 28

59. Mach

60. When an object is traveling close to the same speed as the waves it’s generating, the v- shaped wave generated by the combination of all of the waves from the object is called a… Question 29

61. bow wave

62. An object such as an airplane moving toward you would sound to you as… A)a higher pitch than it’s really making. B) a lower pitch than it’s really making. C) the same pitch that it’s making. Question 30

63. A) a higher pitch than it’s really making

64. At night when the air close to the ground is cold and the air up high is warm, sound waves are… A)refracted down to the ground. B)refracted up toward the sky. C)not refracted at all. Question 31

65. A) refracted down to the ground.

66. If a sound wave has a frequency of 340 Hz, what is its wavelength? (Hint: you need to know the speed of sound in air) Question 32

67. 1 meter

68. What is the name of the point on a standing wave that does not vibrate? Question 33

69. node

70. If one singer sings at 85 decibels, how many decibels would two singers produce? Question 34

71. 88 decibels

72. If you double your distance away from a source of sound you perceive its intensity to be _____ its original value. (be exact) Question 35

73. One forth

74. What are the metric units used to measure sound intensity? Question 36

75. W/m 2

76. A sound that has a power of 4.4 x 10 -3 W has an intensity of 5.60 x 10 -7 W/m 2 at what distance? Question 37

77. 25 m

78. The sound quality that a listener perceives as specific to a certain sound, voice, or instrument is called… Question 38

79. timbre

80. If a pipe opened at both ends is made longer, its frequency… A)gets bigger. B)gets smaller. C)stays constant. Question 39

81. B) Gets smaller

82. By tightening a guitar string, you effectively make the speed of a wave in that string faster. By doing so it would produce a _________ pitch. A)Higher B)Lower C)The same Question 40

83. A) Higher

84. If the length of a pipe opened at both ends is decreased, its fundamental frequency… A)increases. B)decreases. C)remains constant. Question 41

85. A) increases

86. If the air inside a pipe closed at one end gets colder, its fundamental frequency… A)decreases. B)increases. C)remains constant. Question 42

87. A) decreases

88. What frequency is the second harmonic of a pipe opened at both ends that is 52 cm long? (The speed of sound in air is 343 m/s) Report the answer in proper units Question 43

89. 660 Hz

90. FINAL QUESTION What is the term for the rhythmic pattern generated from two similar frequencies interfering with one another.

91. beats