8th Class Science Sound Question Bank

done Sound Total Questions - 35

• question_answer1)
  When we say that sound travels in a medium, what do we mean?
  A)
  The particles of the medium travel. done clear
  B)
                         The source travels. done clear
  C)
                         The disturbance travels. done clear
  D)
                         The medium travels. done clear
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• question_answer2)
  Which of the following correctly represents the speed of sound in solids, liquids and gases in ascending order?
  A)
   Gas > liquid > solid done clear
  B)
                          Liquid > gas > solid done clear
  C)
                          Liquid > solid > gas done clear
  D)
                          Gas > liquid > gas done clear
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• question_answer3)
  A person can hear an approaching train when he presses his ear to the railway track faster than one who simply stands on the tracks. What makes this possible?
  A)
   The vibration of railway tracks done clear
  B)
                          The vibration of air done clear
  C)
                          The speed of sound in solids is more done clear
  D)
                          The hearing ability of the man done clear
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• question_answer4)
  A person can be identified by his voice. What determines this distinguishing feature?

  (i) Amplitude

  (ii) Pitch

  (iii) Loudness

  A)
   Only (i)                                done clear
  B)
                          Only (ii) and (iii)               done clear
  C)
                          Only (i) and (iii)                done clear
  D)
                          (i), (ii) and (iii)                   done clear
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• question_answer5)
  In human beings, which of the following produces the sound?
  A)
   Larynx                                  done clear
  B)
                          Wind pipe          done clear
  C)
                          Eardrum                              done clear
  D)
                          Lungs                   done clear
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• question_answer6)
  An object oscillates 50 times in one second. What is its frequency?
  A)
   0.2 Hz                                   done clear
  B)
                          0.02 Hz                 done clear
  C)
                          0.002 Hz                              done clear
  D)
                          50 Hz    done clear
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• question_answer7)
  In which of the three media does sound travel the fastest?
  A)
   Air                                         done clear
  B)
                          Water done clear
  C)
                          Steel done clear
  D)
                          Speed is same in any medium done clear
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• question_answer8)
  Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen. Why?
  A)
   The speed of sound is greater than the speed of light. done clear
  B)
                          The speed of sound is equal to the speed of light. done clear
  C)
                          The speed of light is greater than the speed of sound. done clear
  D)
                          All of the above done clear
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• question_answer9)
  What is the cause for the difference in the voices of men, women and children?
  A)
   Difference in larynx done clear
  B)
                          Difference in lungs done clear
  C)
                          Difference in vocal cords done clear
  D)
                          Difference in wind pipe done clear
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• question_answer10)
  Which of the following represents Hertz?
  A)
   Second                                done clear
  B)
                          \[\text{Secon}{{\text{d}}^{\text{-1}}}\]               done clear
  C)
                          Metre                                  done clear
  D)
                          \[\text{Metr}{{\text{e}}^{-1}}\] done clear
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• question_answer11)
  On what factors does the loudness or intensity of sound depend?
  A)
   The amplitude of a sound wave done clear
  B)
                          The area of a vibrating body done clear
  C)
                          Distance from the source of sound done clear
  D)
                          All of the above done clear
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• question_answer12)
  On what factors does the pitch of sound depend?
  A)
   Frequency                         done clear
  B)
                          Amplitude done clear
  C)
                          Loudness done clear
  D)
                          The distance from source done clear
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• question_answer13)
  Which of the following produces sound in birds?
  A)
   Vocal cords        done clear
  B)
                          Larynx                  done clear
  C)
                          Glottis                                  done clear
  D)
                          Syrinx                                   done clear
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• question_answer14)
  Find the difference between a musical sound and noise.
  A)
   Amplitude          done clear
  B)
                          Loudness            done clear
  C)
                          Vibrations                          done clear
  D)
                          All of the above done clear
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• question_answer15)
  Which of the following are the effects of noise pollution?

  (i) Insomnia

  (ii) Hypertension

  (iii) Hearing impairment

  A)
   Only (i) and (ii) done clear
  B)
                          Only (ii) and (iii)               done clear
  C)
                          Only (i) and (iii)                done clear
  D)
                          (i), (ii) and (iii) done clear
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• question_answer16)
                    Which of the following frequencies cannot be heard by human beings?
  A)
   1000 Hz                                done clear
  B)
                          10,000 Hz                            done clear
  C)
                          100 Hz                                  done clear
  D)
                         1, 00, 000 Hz done clear
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• question_answer17)
  Identify the three delicate bones in the middle ear.
  A)
   Pinna, anvil and cochlea done clear
  B)
                          Hammer, anvil and cochlea done clear
  C)
                          Pinna, eardrum and anvil done clear
  D)
                          Hammer, anvil and stirrup done clear
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• question_answer18)
  Identify the nerve that carries the signals from the ear to the brain.
  A)
   The auditory nerve done clear
  B)
                          The optic nerve done clear
  C)
                         The motor nerve done clear
  D)
                          The spinal cord done clear
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• question_answer19)
  Which of the following helps human beings in producing sounds?
  A)
   The eardrum done clear
  B)
                          The auditory nerve done clear
  C)
                          The optical cortex done clear
  D)
                          The vocal cords done clear
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• question_answer20)
  What is the number of vibrations made by a body in one second called?
  A)
   Frequency         done clear
  B)
                          Wavelength                      done clear
  C)
                          Loudness                            done clear
  D)
                          Pitch                     done clear
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• question_answer21)
  Which instrument always produces vibrations of the same frequency?
  A)
   A speaker           done clear
  B)
                          A bell Jar                             done clear
  C)
                          An electric bell done clear
  D)
                          A tuning fork done clear
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• question_answer22)
  How is a musical note characterized by?
  A)
   Loudness done clear
  B)
                          Pitch done clear
  C)
                          Timbre done clear
  D)
                          All of the above done clear
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• question_answer23)
  On what factors does the frequency of sound depend in wind instruments?
  A)
   The length of the air column done clear
  B)
                          The breadth of the air column done clear
  C)
                          The force with which the wind is blown done clear
  D)
                          All of the above done clear
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• question_answer24)
  What happens to the pitch, when we tighten the strings of a guitar?
  A)
   It increases done clear
  B)
                          It decreases done clear
  C)
                          It remains the same done clear
  D)
                          It may increase or decrease done clear
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• question_answer25)
  Which of the following correctly describes the pitch and the frequency of the sound of a girl's scream?
  A)
   Low pitch, low frequency done clear
  B)
                          Low pitch, high frequency done clear
  C)
                          High pitch, low frequency done clear
  D)
                          High pitch, high frequency done clear
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• question_answer26)
  When a tuning fork was struck and brought near a bucket of water, a wave as shown in the figure, was formed on its surface. If the fork is struck harder and brought near the surface, what will increase?
  A)
   Frequency         done clear
  B)
                          Wavelength      done clear
  C)
                          Velocity                               done clear
  D)
                          Amplitude done clear
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• question_answer27)
  How does a whistle produce sound?
  A)
   The body of whistle stores air. done clear
  B)
                          The air vibrates. done clear
  C)
                          The person produces vibrations. done clear
  D)
                          All of the above done clear
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• question_answer28)
  Why are sounds of different frequencies produced when the length of the scale protruding out of table is changed and then vibrated?
  A)
   Due to change in length done clear
  B)
                          Due to change in velocity done clear
  C)
                          Due to change in amplitude done clear
  D)
                          All of the above done clear
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• question_answer29)
  If you go on increasing the stretching force on a wire in a guitar, what happens to its frequency?
  A)
   It increases done clear
  B)
                          It decreases done clear
  C)
                          It remains unchanged done clear
  D)
                          It cannot be said done clear
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• question_answer30)
  A bomb explodes on the moon. How long will it take for the sound to reach the earth?
  A)
   10 seconds done clear
  B)
                          1000 seconds done clear
  C)
                          1 day done clear
  D)
                          Sound will not be heard done clear
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• question_answer31)
  Which is true of a body that vibrates with a higher frequency of 2, 00, 000 Hz?
  A)
   It does not always produce sound. done clear
  B)
                          Shrill sounds are produced, which human being can hear. done clear
  C)
                          Dolphins can hear the sound. done clear
  D)
                          All of the above done clear
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• question_answer32)
  Which of the following is expressed in decibels?
  A)
   Loudness and amplitude of sound done clear
  B)
                          Loudness and pitch of sound done clear
  C)
                          Amplitude and pitch of sound done clear
  D)
                          Frequency of sound done clear
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• question_answer33)
  How can the brain interpret the frequency of a sound?
  A)
   By the loudness of sound done clear
  B)
                          By the frequency of sound done clear
  C)
                          By the pitch of sound done clear
  D)
                          By the amplitude of sound done clear
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• question_answer34)
  In a stethoscope, how does the sound of heart beat travel through its tube?
  A)
   By bending along the tube done clear
  B)
                          In a straight line done clear
  C)
                          By undergoing multiple reflections done clear
  D)
                          As ultrasonic frequency done clear
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• question_answer35)
  The frequency of a source is 15 kHz. What will be the frequency of the sound wave produced by it in water and air?
  A)
   It is the same as that of the source. done clear
  B)
                          Frequency in water will be more than that in air. done clear
  C)
                          Frequency in air will be more than that in water. done clear
  D)
                          Depends upon the velocities of sound in these media. done clear
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