Chapter 12 Review Mr. Hauser

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.

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!

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

crest

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

C) amplitude

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

B) Wavelength

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

sine

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

A) Mechanical wave

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

Hertz

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.

B) the warmer the air must be

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

C) 20 Hz - 20,000 Hz

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

Transverse waves

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

Compression wave

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

rarefaction

Question 12 What is the symbol used for wavelength?

Lambda ( )

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

C) Air temperature and humidity

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

E) frequency

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

A) solids

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

echo

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

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

Ultrasonic

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.

C) Forced Vibration

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

Decibels

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

Natural Frequency

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

Resonance

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

Washington

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

Interfere

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

Constructive

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

The Doppler Effect

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

sonic boom

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

Mach

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

bow wave

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

A) a higher pitch than it’s really making

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

A) refracted down to the ground.

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

1 meter

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

node

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

88 decibels

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

One forth

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

W/m 2

A sound that has a power of 4.4 x W has an intensity of 5.60 x W/m 2 at what distance? Question 37

25 m

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

timbre

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

B) Gets smaller

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

A) Higher

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

A) increases

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

A) decreases

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

660 Hz

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

beats