WorksheetsSound
Total questions: 18
Worksheet time: 12mins
Something that produces a sensation of hearing in our ears.
(a)
____________ is the back-and-forth motion of an object.
Vibration
Sound wave
Frequency
Amplitude
_____________ is the number of oscillations or vibrations made by a body in one second.
Noise
Frequency
Vibration
Amplitude
The maximum displacement or extent of vibration/oscillation of a body from its mean position is called ___________.
Sound
Time Period
Infrasonic Sounds
Amplitude
In humans, sound is produced by the _________ and perceived by the _________.
ears; larynx/voice box
pitch; baritone
larynx/voice box; ears
loudness; shrillness
none of these
A sound which is not pleasing to the ears.
(a)
A melodious sound that creates a pleasant sensation in the ears.
(a)
Ultrasonic sounds have a frequency that is:
Lesser than 20 kHz
Higher than 20 kHz
Equal to 20 kHz
None of these
Infrasonic sounds have a frequency that is:
None of these
Equal to 20 Hz
Higher than 20 Hz
Lesser than 20 Hz
Select some sources of noise pollution:
Traffic
Construction Sites
Industries
Singing
Medicines
Through which medium does sound travel faster?
Air
Water
Dolphins produce ________ kind of sound.
Ultrasonic
Infrasonic
Elephants produce __________ kind of sound.
Ultrasonic
Infrasonic
The SI unit of sound is (a) .
What is the loudness of a sound is measured in?
Decibel
Hertz
Pitch
Sonar
A medium through which a sound cannot travel
(a)
Which of these is not a harmful effect of noise pollution?
High blood pressure
Deafness
Pitch
Fatigue
Lack of concentration
Furnishings like draperies and cushions help absorb sound, therefore reducing noise pollution.
True
False
