Focus On Life Science: California Grade 7

Chapter 12: The Ear and Sound

Standards Review

1.
Sound travels through air as a ___________. 5.g
A)vibration wave
B)rarefaction wave
C)transverse wave
D)compression wave
2.
Waves are disturbances that carry ________ from one place to another. 5.g
A)light
B)sound
C)energy
D)water
3.
What is the area of rarefaction in a sound wave? 5.g
A)Where the molecules in air are spread apart.
B)Where the molecules in air are pushed together.
C)Where the sound wave is produced.
D)Where the sound wave hits the ear.
4.
Frequency is measured in ________. 5.g
A)wavelengths
B)m
C)m/s
D)Hz
5.
Which is true about the areas of rarefaction in a sound wave. 5.g
A)The area has low pressure and low density.
B)The area has low pressure and high density.
C)The area has high pressure and high density.
D)The area has high pressure and low density.
6.
Which is a person's perception of how much energy a sound wave carries? 5.g
A)amplitude
B)loudness
C)decibel
D)pitch
7.
Which is the quietest sound that humans can hear? 5.g
A)50 dB
B)10 dB
C)0 dB
D)100 dB
8.
As the pitch of a sound increases, what happens to the sound's frequency? 5.g
A)It depends on the instrument making the sound.
B)It decreases.
C)It decreases.
D)It increases.
9.
Which is the portion of the outer ear that collects sound waves and passes them on to the middle ear? 5.g
A)auditory canal
B)external ear
C)incus
D)tympanic membrane
10.
Which is the thin layer of skin that vibrates when sound waves hit it? 5.g
A)tympanic membrane
B)cochlea
C)oval window
D)stapes
11.
How many bones are in the middle ear? 5.g
A)5
B)2
C)4
D)3
12.
What does the Eustachian tube do? 5.g
A)It funnels sound into the middle ear.
B)It connects the middle ear to the throat
C)It vibrates against the tympanic membrane.
D)It connects the middle ear to the outer ear.
13.
Which structure is lined with sensory cells to detect different frequencies of sound? 5.g
A)malleus
B)incus
C)cochlea
D)oval window
14.
What kind of hearing loss is permanent? 5.g
A)Buildup of material in the auditory canal.
B)Blockage of the middle ear.
C)Infections of the eardrum.
D)Damage to cochlea.
15.
A reflected sound wave is called an _________. 5.g
A)echo
B)compression wave
C)pitch
D)vibration
Grade 7
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