CBSE Class 9 Science Sound Worksheet Set A

Read and download free pdf of CBSE Class 9 Science Sound Worksheet Set A. Download printable Science Class 9 Worksheets in pdf format, CBSE Class 9 Science Chapter 12 Sound Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 9 Assignments and practice them daily to get better marks in tests and exams for Class 9. Free chapter wise worksheets with answers have been designed by Class 9 teachers as per latest examination pattern

Chapter 12 Sound Science Worksheet for Class 9

Class 9 Science students should refer to the following printable worksheet in Pdf in Class 9. This test paper with questions and solutions for Class 9 Science will be very useful for tests and exams and help you to score better marks

Class 9 Science Chapter 12 Sound Worksheet Pdf

Question : Explain how sound is produced by your school bell.
Answer :  School bell starts vibrating when heated which creates compression and rarefaction in air and sound is produced.
 
Question : Why are sound waves called mechanical waves?
Answer : Since sound waves do some mechanical work while making disturbance in medium, hence sound waves are called mechanical wave.
 
Question : Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?
Answer : Since sound waves require medium to propagate and there is no medium present on the moon. So, I will not able to hear the sound of my friend on the moon.
 
Question : Which wave property determines (a) loudness, (b) pitch?
Answer : (a) Amplitude of sound waves determines loudness. Louder sound has greater amplitude and vice versa.
(b) Frequency of the sound waves determined pitch of the sound.
 
Question :   Guess which sound has a higher pitch: guitar or car horn?
Answer : Sound of the car horn has higher pitch.
 
Question :   What are wavelength, frequency, time period and amplitude of a sound wave?
Answer : Wavelength: Wavelength is the distance between two consecutive compressions or rarefaction of wave.
Frequency: The number of sound wave produced in one second is called frequency.
Time period: Time period is the time taken to produce one wave of sound.
Amplitude: Amplitude is the maximum displacement along the mean position of the particles of medium.
 
Question :   How are the wavelength and frequency of a sound wave related to its speed?
Answer :   The relation between frequency and wavelength of sound wave is given as follows:
Velocity (v)=Wavelength(λ)X Frequency (ν), v = λX ν
This means the speed is equal to the product of wavelength and frequency of the sound wave.
This equation is also called the ‘wave equation’ and applicable to all types of wave.
 
Question :   Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium.
Answer :   Given,
Frequency (ν) = 220 Hz
Velocity (v) = 440m/s
Wavelength (λ) =?
We know;
 
C-3
Thus, wavelenght = 2m
 
Question : A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?
Answer : Since, the time interval between successive compressions is called time period or time interval.
Here given,
Frequency (ν) = 500Hz
T (Time period) =?
We know that;
C-4
Thus, time interval between two consecutive compression of the given
wave = 0.2 s
 
Question : Distinguish between loudness and intensity of sound.
Answer : Loudness of sound is determined of amplitude and intensity of the sound wave is determined by frequency of sound waves.
 
Question :   In which of the three media; air, water or iron does the sound travel the fastest at a particular temperature?
Answer :  At particular temperature sound travels fastest in iron.
 
Question : An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m /s?
Answer :  To return an echo sound has to cover distance of two way.
Here, given,
Speed of sound = 342 m/s
Time = 3s
Thus,
Distance = speed X time
⇒ Distance = 342m/s×3 s=1026 m
Thus,the distance between the source and reflecting
surface=1026÷2=513m
 
Question : Why are the ceilings of concert halls curved?

Answer : Since, concert halls are big, so audience at the back rows of the hall may not hear clear sound of speaker. To overcome this problem, the ceiling of the concert halls is made concave. Concave ceiling helps the sound wave to reflect and send to farther distance which makes the
concert hall enable to send clear sound to the audience even sitting in back rows of hall.
 

Question : What is the audible range of the average human ear?

Answer : 20 Hz to 20000 Hz
 
Question : What is the range of frequencies associated with

(a) Infrasound

(b) Ultrasound

Answer :
(a) Infrasound: Less than 20 Hz
(b) Ultrasound: More than 20000 Hz
 
Question : A submarine emits a SONAR pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff ?

Answer : To return the SONAR pulse back, its wave has to travel two way.
Here, given,
Velocity (v) of sound wave = 1531m/s
Time (T) = 1.02 s
Thus, Distance = speed X time
Distance=1531 ms(-1)×1.02 s=1561.62 m
So,the distance between the source and reflecting
surface =1561.62÷2=780.81m

Question : Who discovered the sound waves? 
Answer :  Galileo Galilei discovered sound waves.

Question : Define sound? 
Answer :  Sound is a form of energy which produces a sensation of hearing in our ears.

Question : How sound is produced?
Answer :  Sound is produced by vibrating objects.
 
Question : What is medium? 
Answer :  The matter or substance through which sound is transmitted is known as medium.

Question : Which is the most common medium of traveling the sound?
Answer :  Air is the most common medium through which sound travels.
 


Click below to download practice worksheet for CBSE Class 9 Science Sound Worksheet Set A
Chapter 01 Matter in Our Surroundings
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set A
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set B
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set C
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set D
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set E
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set F
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set G
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set H
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set I
Chapter 02 Is Matter Around Us Pure
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set A
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set B
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set C
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set C
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set D
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set D
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set F
Chapter 03 Atoms and Molecules
CBSE Class 9 Science Atoms and Molecules Worksheet Set A
CBSE Class 9 Science Atoms and Molecules Worksheet Set B
CBSE Class 9 Science Atoms and Molecules Worksheet Set C
CBSE Class 9 Science Atoms and Molecules Worksheet Set D
CBSE Class 9 Science Atoms and Molecules Worksheet Set E
CBSE Class 9 Science Atoms and Molecules Worksheet Set F
CBSE Class 9 Science Atoms and Molecules Worksheet Set G
CBSE Class 9 Science Atoms and Molecules Worksheet Set H
Chapter 04 Structure of the Atom
CBSE Class 9 Science Structure of The Atom Worksheet Set A
CBSE Class 9 Science Structure of The Atom Worksheet Set B
CBSE Class 9 Science Structure of The Atom Worksheet Set C
CBSE Class 9 Science Structure of The Atom Worksheet Set D
Chapter 05 The Fundamental Unit of Life
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set A
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set B
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set C
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set D
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set E
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set F
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set G
Chapter 06 Tissues
CBSE Class 9 Science Plant Tissues Worksheet Set A
CBSE Class 9 Science Tissue Worksheet Set C
CBSE Class 9 Science Tissue Worksheet Set D
CBSE Class 9 Science Tissue Worksheet Set E
CBSE Class 9 Science Tissue Worksheet Set F
CBSE Class 9 Science Tissues Worksheet Set A
CBSE Class 9 Science Tissues Worksheet Set B
Chapter 07 Diversity In Living Organisms
CBSE Class 9 Science Diversity in Living Organism Worksheet Set A
CBSE Class 9 Science Diversity in Living Organism Worksheet Set B
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set C
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set D
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set E
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set F
Chapter 08 Motion
CBSE Class 9 Science Motion Worksheet Set A
CBSE Class 9 Science Motion Worksheet Set B
CBSE Class 9 Science Motion Worksheet Set C
CBSE Class 9 Science Motion Worksheet Set D
CBSE Class 9 Science Motion Worksheet Set E
CBSE Class 9 Science Motion Worksheet Set F
CBSE Class 9 Science Motion Worksheet Set G
CBSE Class 9 Science Motion Worksheet Set H
CBSE Class 9 Science Motion Worksheet Set I
CBSE Class 9 Science Motion Worksheet Set J
Chapter 09 Force and Laws of Motion
CBSE Class 9 Science Force and Laws of Motion Worksheet Set A
CBSE Class 9 Science Force and Laws of Motion Worksheet Set B
CBSE Class 9 Science Force and Laws of Motion Worksheet Set C
CBSE Class 9 Science Force and Laws of Motion Worksheet Set D
CBSE Class 9 Science Force and Laws of Motion Worksheet Set E
CBSE Class 9 Science Force and Laws of Motion Worksheet Set F
Chapter 10 Gravitation
CBSE Class 9 Science Gravitation Worksheet Set A
CBSE Class 9 Science Gravitation Worksheet Set B
CBSE Class 9 Science Gravitation Worksheet Set C
CBSE Class 9 Science Gravitation Worksheet Set D
Chapter 11 Work and Energy
CBSE Class 9 Science Work and Energy Worksheet Set A
CBSE Class 9 Science Work and Energy Worksheet Set B
Chapter 12 Sound
CBSE Class 9 Science Sound Worksheet Set A
CBSE Class 9 Science Sound Worksheet Set B
Chapter 13 Why Do We Fall Ill
CBSE Class 9 Science Why Do We Fall ill Worksheet Set A
CBSE Class 9 Science Why Do We Fall ill Worksheet Set B
Chapter 14 Natural Resources
CBSE Class 9 Science Natural Resource Worksheet Set C
CBSE Class 9 Science Natural Resource Worksheet Set D
CBSE Class 9 Science Natural Resource Worksheet Set E
CBSE Class 9 Science Natural Resource Worksheet Set F
CBSE Class 9 Science Natural Resources Worksheet Set A
CBSE Class 9 Science Natural Resources Worksheet Set B
Chapter 15 Improvement in Food Resources
CBSE Class 9 Science Improvent in Food Resources Worksheet Set A
CBSE Class 9 Science Improvent in Food Resources Worksheet Set B
z More Worksheets for Class 9 Science
CBSE Class 9 Science Lab Worksheet Different Chemical Changes
CBSE Class 9 Science Lab Worksheet law of Conservation of Mass
CBSE Class 9 Science Lab Worksheet Melting Point of Ice
CBSE Class 9 Science Lab Worksheet Preparation of Mixture and Compound
CBSE Class 9 Science Lab Worksheet Separation of Different Components
CBSE Class 9 Science Lab Worksheet True Solution Colloid Suspension
CBSE Class 9 Science Worksheet Set A
CBSE Class 9 Science Worksheet Set B
CBSE Class 9 Science Worksheet Set C
CBSE Class 9 Science Worksheet Set D
CBSE Class 9 Science Worksheet Set E
CBSE Class 9 Science Worksheet Set F
CBSE Class 9 Science Worksheet Set G
CBSE Class 9 Science Worksheet Set H
CBSE Class 9 Science Worksheet Set I
CBSE Class 9 Science Worksheet Set J
CBSE Class 9 Science Worksheet Set K
CBSE Class 9 Science Worksheet Set L
CBSE Class 9 Science Worksheet Set M Solved
CBSE Class 9 Science Worksheet Set N Solved
CBSE Class 9 Science Worksheet Set O Solved
CBSE Class 9 Science Worksheet Set P Solved
CBSE Class 9 Science Worksheet Set Q Solved
CBSE Class 9 Science Worksheet Set R Solved
CBSE Class 9 Science Worksheet Set S Solved
CBSE Class 9 Science Worksheet Set T Solved
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Chapter 12 Sound CBSE Class 9 Science Worksheet

The above practice worksheet for Chapter 12 Sound has been designed as per the current syllabus for Class 9 Science released by CBSE. Students studying in Class 9 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 9 Science on a daily basis. All the latest practice worksheets with solutions have been developed for Science by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 9 Science students to get all the latest study material free of cost. Teachers of studiestoday have referred to the NCERT book for Class 9 Science to develop the Science Class 9 worksheet. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 9 Science designed by our teachers. After solving these you should also refer to Class 9 Science MCQ Test for the same chapter. We have also provided a lot of other Worksheets for Class 9 Science which you can use to further make yourself better in Science.

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