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WorksheetsClass 8 Sound
Total questions: 18
Worksheet time: 10mins
(a) helps us to communicate.
The voice box is also called as
stomach
heart
larynx
mouth
Sound is a kind of
work
pressure
force
energy
The hearing range of human ear is
20 Hz to 20,000 Hz
less than 20 Hz
more than 20,000 Hz
20 Hz to 25,000 Hz
Pitch of sound is determined by its
frequency
speed
amplitude
loudness
1 hertz is equal to
1 vibration per minute
10 vibrations per minute
60 vibrations per minute
600 vibrations per minute
Sound cannot travel through
air
water
vacuum
solid
The sound in the audible range is called
ultrasonic sound
sonic sound
subsonic sound
light sound
A pendulum oscillates 20 times in 4 seconds. Find its time period.
0.05 sec.
0.001 sec.
0.2 sec.
0.1 sec.
Loudness of sound is determined by
pitch
frequency
amplitude
time period
The number of vibrations made by a vibrating body in one second is
frequency
noise
loudness
pitch
The maximum displacement of a body from its mean position is called
amplitude
oscillation
periodic motion
frequency
Sound is produced by
Non-Vibrating objects only
Vibrating and non- vibrating objects
Vibration has no relation to sound
Vibrating objects only
Vibration is also known as
Vibratory motion
Translatory motion
Oscillatory motion
None of these
The number of oscillations per second is called
Amplitude of oscillation
Pitch of oscillation
Frequency of oscillation
None of the above
Above _____ dB the sound becomes physically painful
60
70
110
130
When the amplitude of vibration is large, sound produced is
No sound
feeble
loud
No relation between amplitude and sound
Voice of man is heavy compared to a woman because
Female vocal cord is longer
Male vocal cord is shorter
Male vocal cord is longer
The concept is not related
