WorksheetsSound
Total questions: 30
Worksheet time: 15mins
Which of the following correctly represents the speed of sound in solids, liquids, and gases in ascending order?
Gas > liquid > solid
Liquid > gas > solid
Liquid > solid > gas
Solid> gas > liquid
In human beings, which of the following produces the sound?
Windpipe
Eardrum
Larynx
Lungs
An object oscillates 50 times in one second. What is its frequency?
0.2 Hz
0.02 Hz
0.002 Hz
50 Hz
In which of the three medium does sound travel the fastest?
Steel
Air
Water
Speed is the same in any medium
How can the brain interpret the frequency of a sound?
By the loudness of sound
By the frequency of sound
By the pitch of the sound
By the amplitude of the sound
Which is true of a body that vibrates with a higher frequency of 2, 00, 000 Hz?
It does not always produce sound.
Shrill sounds are produced, which human beings can hear.
Dolphins can hear the sound.
All of the above
Which of the following is expressed in decibels?
Amplitude
Loudness
Pitch
Frequency
A bomb explodes on the moon. How long will it take for the sound to reach the earth?
10 seconds
1000 seconds
1 day
Sound will not be heard
If you go on increasing the stretching force on a wire in a guitar, what happens to its frequency?
It increases
It decreases
It remained unchanged
How does a whistle produce sound?
The body of the whistle stores air
The air vibrates
The person produces vibrations
All of the above
Which of the following correctly describes the pitch and the frequency of the sound of a girl's scream?
Low pitch, low frequency
High pitch, low frequency
Low pitch, high frequency
High pitch, high frequency
On what factors does the frequency of sound depend in wind instruments?
The length of the air column
The breadth of the air column
The force with which the wind is blown
All of the above
Which instrument always produces vibrations of the same frequency?
A speaker
A bell jar
An electric bell
A turning fork
What is the number of vibrations made by a body in one second called?
Loudness
Frequency
Pitch
Wavelength
Which of the following helps human beings in producing sounds?
The eardrum
The auditory nerve
The vocal cords
The optical cortex
Identify the nerve that carries the signals from the ear to the brain.
The auditory nerve
The optic nerve
The motor nerve
The spinal cord
Identify the three delicate bones in the middle ear.
Pinna, anvil, and cochlea
Pinna, eardrum, and anvil
Hammer, anvil, and stirrup
Hammer, anvil, and cochlea
Which of the following frequencies cannot be heard by human beings?
1000 Hz
10,000 Hz
100 Hz
1,00,000 Hz
Which of the following are the effects of noise pollution?
(i) Insomnia
(ii) Hypertension
(iii) Hearing impairment
Only (i) and (ii)
Only (ii) and (iii)
Only (i) and (iii)
(i), (ii) and (iii)
On what factors does the pitch of sound depend?
Loudness
Amplitude
Frequency
The distance from the source
What is the cause for the difference in the voices of men, women, and children?
Difference in larynx
The difference in vocal cords
Difference in lungs
The difference in the windpipe
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen. Why?
The speed of sound is greater than the speed of light.
The speed of sound is equal to the speed of light.
The speed of light is greater than the speed of sound.
All of the above
Sound cannot travel in -
Solids
Gases
Liquids
Vacuums
The frequency of sound is lowest for
Man
Woman
Young boy
Young girl
Which one of the following material will reflect sound better?
Thermocol
Curtain made from cloth
Paper
Steel
An object vibrated with a frequency of 15 Hz. Which of the following is true?
It produces a sound that we can hear.
It does not produce sound.
It produces a sound that we cannot hear.
Tick the odd one out -
40 dB
70 dB
150 dB
90 dB
A woman's voice is high - pitched than a man's voice because her vocal cords are
Stretched
Long
Short
Moulded
Sound is a kind of -
Energy
Force
Pressure
Work
The hearing range of the human ear is -
20 Hz to 20,000 Hz
Less than 20 Hz
More than 20,000 Hz
20 Hz to 25,000 Hz
