MCQ Questions for Class 8 Science Chapter 13 Sound with Answers
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MCQ Questions for Class 8 Science Chapter 13 Sound with Answers
Choose the correct option from the following:
Question 1. Sound is form of energy which creates sensation of
(a) hearing
(b) viewing
(c) feeling
(d) dreaming
Answer: hearing
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Question 2 Sound is produce when an object is
(a) moving
(b) remain stationary
(c) vibrating
(d) dancing
Answer: vibrating
Question 3. Traveling of sound from one place to another place is called
(a) music
(b) noise
(c) propagation of sound
(d) none of the above.
Answer: propagation of sound.
Question 4. The human beings produce sound by using
(a) lung
(b) mouth
(c) larynx
(d) tongue
Answer: larynx
Question 5. Sound propagate through
(a) only solids
(b) only liquids
(c) only gases
(d) all of the above.
Answer: all of the above.
Question 6. Sound can propagate
(a) only through material medium
(b) only through vaccum
(c) both through material medium as well as vaccum
(d) none of the above.
Answer: only through material medium.
Question 7. Sound is called mechanical wave because
(a) it can travell through vaccum
(b) for its propagation material medium is necessary
(c) it only travell with the help of machine
(d) none of the above.
Answer: for its propagation material medium is necessary.
Question 8. Sound travell fastest through
(a) solids
(b) liquids
(c) gases
(d) vaccum
Answer: solids
Question 9. Sound produce in sun, we can not heard it because
(a) sun is fur away from earth
(b) sound produce by sun is fade sound
(c) the sound of the sun is obstructed by moon
(d) sound can not travell through vaccum.
Answer: (d) sound can not travell through vaccum.
Question 10. Two astronomers talks in between them using wireless sets because
(a) there is very hot outside
(b) there is very cold outside
(c) to avoid infection of bacteria
(d) there is no air
Answer: there is no air.
MCQ Questions for Class 8 Science Chapter 13 Sound with Answers
Question 11. Speed of sound in air is
(a) 400 metre per second
(b) 300 metre per second
(c) 340 metre per second
(d) 450 metre per second.
Answer:(c) 340 metre per second.
Question 12. Speed of sound in water nearly
(a) 1000 metre per second
(b) 1500 metre per second
(c) 2000 metre per second
(d) 2500 metre per second.
Answer: (b) 1500 metre per second.
Question 13. If we want oto hear a train approaching from far away, it is more convenient to put the ear to the railway track, because speed of sound is
(a) more in case of solids than air
(b) less in case of solids than air
(c) equal in solids and air
(d) none of the above.
Answer: (a) more in case of solids than air.
Question 14. If we compare the speed in between sound and light
(a) speed of sound is more than light
(b) speed of light is more than sound
(c) both have the same speed
(d) some time speed of sound is more and sometime that of light.
Answer: (b) speed of light is more than sound.
Question 15. During rain, we first see the lightning then heard the thunder, because
(a) speed of light is more then sound
(b) speed of sound is more then light
(c) both have the same speed
(d) none of the above.
Answer: (a) speed of light is more then sound.
Question 16. The thin, elastic and circular membrane at the end of ear canal is called
(a) pinna
(b) cochlea
(c) eardrum
(d) auditory nerve.
Answer: (c) eardrum.
Question 17. Ear is divided into
(a) two parts
(b) three parts
(c)four parts
(d) five parts
Answer: (b) three parts
Question 18. Number of tiny bones present in ear are
(a) one
(b) two
(c) three
(d) four
Answer: three.
Question 19. Name of the bones present in ear are
(a) Hammer, Anvil and eardrum
(b) outer bone, middle bone and inner bone
(c) Hammer, Anvil and Stirrup
(d) eardrum, cochlea and auditory nerve.
Answer:(c) Hammer, Anvil and Stirrup.
Question 20. The nerve which carry the sensation of sound to the brain is
(a) optic nerve
(b) alfactory nerve
(c) auditory nerve
(d) none of the above.
Answer: (c) auditory nerve.
Question 21. A repeated back and forth motion is called
(a) pitch
(b) frequency
(c) vibration
(d) amplitude
Answer: (c) vibration
Question 22. The maximum displacement of a vibrating object from its mean position is called
(a) amplitude
(b) pitch
(c) frequency
(d) quality
Answer: (a) amplitude.
Question 23. SI Unit of amplitude is
(a) centimetre
(b) hertz
(c) metre
(d) second
Answer: (c) metre.
Question 24. The time taken by a vibrating body to complete one vibration is called
(a) amplitude
(b) pitch
(c) frequency
(d) time period
Answer: (d) time period.
Question 25. SI unit of time period is
(a) metre
(b) hertz
(c) second
(d) centimetre
Answer: second.
MCQ Questions for Class 8 Science Chapter 13 Sound with Answers
Question 26. For a give pendulum, the time period is
(a) same always
(b) different
(c) some time same and some time different
(d) none of the above.
Answer: (a) same always.
Question 27. The number of vibrations completed by a vibrating body in one second is called
(a) amplitude
(b) frequency
(c) pitch
(d) time period
Answer: frequency
Question 28. The SI unit of frequency is
(a) metre
(b) second
(c) hertz
(d) centimetre
Answer: (c) hertz.
Question 29. The relation between time period and frequency is
(a) directly proportional
(b) time period is greater then frequency
(c) time period is less then frequency
(d) inversely proportional
Answer: (d) inversely proportional.
Question 30. Name the property of sound by which we can differentiate the loud sound from fade sound.
(a) loudness
(b) pitch
(c) quality
(d) none of the above.
Answer: (a) loudness.
Question 31. Name the property which determine the shrillness of a sound having same loudness
(a) loudness
(b) pitch
(c) quality
(d) none of the above
Answer: (b) pitch
Question 32. Name the characteristics of the sound which helps to distinguish the sounds produce by different sound producing objects having same pitch and loudness
(a) loudness
(b) pitch
(c) quality
(d) none of the above
Answer: (c) quality.
Question 33. Loudness of a sound is depend on
(a) amplitude
(b) frequency
(c) time period
(d) none of the above
Answer: amplitude.
Question 34. Pitch of a sound depend upon
(a) amplitude
(b) frequency
(c) time period
(d) none of the above.
Answer: (b) frequency.
Question 35. The sound produce by the different musical instruments can be differentiate by the property called
(a) loudness
(b) pitch
(c)amplitude
(d) quality
Answer: (d) quality.
Question 36. The sound which has frequency between 20 hertz to 20000 hertz is called
(a) musical sound
(b) noise
(c) audible sound
(d) inaudible sound.
Answer: (c) audible sound.
Question 37. The sound whose frequency is less than 20 hertz or more than 20000 hertz is called
(a)musical sound
(b) noise
(c) audible sound
(d) inaudible sound
Answer: inaudible sound.
Question 38. The sound whose frequency is less than 20 hertz is called
(a) infrasonic sound
(b) ultrasonic sound
(c) noise
(d) none of the above
Answer: (a) infrasonic sound.
Question 39. The sound whose frequency is more than 20000 hertz is called
(a) infrasonic sound
(b) ultrasonic sound
(c) musical sound
(d) none of the above.
Answer: (b) ultrasonic sound.
Question 40. An animal which can produce ultrasonic sound is
(a) cow
(b) dog
(c) bat
(d) none of the above
Answer: (c) bat
MCQ Questions for Class 8 Science Chapter 13 Sound with Answers
Question 41. An animal which cal ultrasonic sound is
(a) cow
(b) dog
(c) goat
(d) none of the above.
Answer: (b) dog.
Question 42. The sound which is used to study the growth of foetus is
(a) audible sound
(b) inaudible sound
(c) infrasonic sound
(d) ultrasonic sound.
Answer: (d) ultrasonic sound.
Question 43. The unpleasant sound is called
(a) audible sound
(b) infrasonic sound
(c) music
(d) noise
Answer: (d) noise.
Question 44. The sound which is pleasant to hear is called
(a) audible sound
(b) infrasonic sound
(c) music
(d) noise
Answer: (c) music.
Question 45. Example of a stringed instrument is
(a) flute
(b) sitar
(c) tabla
(d) cymbals
Answer: (b) sitar
Question 46. Name one wind musical instrument is
(a) flute
(b) sitar
(c) tabla
(d) cymbals
Answer: (a) flute
Question 47. Example of a membrane musical instrument is
(a) flute
(b) sitar
(c) tabla
(d) cymbals
Answer: (c) tabla
Question 48. Example of a plate musical instrument is
(a) flute
(b) sitar
(c) tabla
(d) cymbals
Answer: cymbals.
Question 49. Voice of which of the following likely to be produce minimum frequency
(a) a man
(b) a woman
(c) a baby girl
(d) a baby boy.
Answer: (a) a man.
Question 50. A vibrating body produce
(a) heat
(b) energy
(c) sound
(d) none of the above.
Answer: (c) sound.
Question 51. Number of vocal cord in human is
(a) one
(b) two
(c) three
(d) four.
Answer: (b) two.
Question 52. Sound does not travel in
(a) solids
(b) liquids
(c) gases
(d) vaccum.
Answer: (d) vaccum.
Question 53. The range of audible sound is
(a) less then 20 hertz
(b) more then 20000 hertz
(c) between 20 to 20000 hertz
(d) none of the above
Answer: (c) between 20 to 20000 hertz.
Question 54.When the amplitude of a sound become double then loudness of the sound will be
(a) become half
(b) become double
(c) remain unchanged
(d) none of the above.
Answer: (b) become double.
Question 55. Sound is a kind of
(a) force
(b) work
(c) energy
(d) pressure
Answer: (c) energy.
Question 56. A pendulum oscillates 20 times in 10 seconds then its time period will be
(a) 5 second
(b)1 second
(c) 0.4 second
(d) 0.5 second.
Answer: (d) 0.5 second.
MCQ Questions for Class 8 Science Chapter 13 Sound with Answers
Fill in the blanks:
Question 1. Sound is a form of ...............
Answer: energy
Question 2. Sound is produced by ............ objects.
Answer: vibrating
Question 3. When sound is travell from one place to another place is called ..............
Answer: propagation of sound.
Question 4. The human beings produce sound by using the voice box which is called .......
Answer: larynx
Question 5. The human voice box contain two ligaments called ..........
Answer: vocal cord
Question 6. Sound need a .......... for propagation.
Answer: medium
Question 7. Sound can travell through .......... , .............. and ................
Answer: solids, liquids and gases.
Question 8. Sound can not travell through ...........
Answer: vaccum.
Question 9. Sound is an example of .......... wave.
Answer: mechanical
Question 10. Sound ........... be heard on the surface of moon.
Answer: can not
Question 11. Sound travell slowest in .........., faster in ............ and fastest in ................
Answer: sound travell slowest in gases, faster in liquids and fastest in solids.
Question 12. Speed of sound in air is about ..............
Answer: 340 metre per second.
Question 13. Speed of light is ............. then sound.
Answer: greater
Question 14. At the end of ear canal there is a thin, elastic and circular membrane present which is called ............
Answer: eardrum.
Question 15. Cochlea present in ............ ear.
Answer: inner
Question 16. The name of three bones present in ear are ............... , .................... and ..................
Answer: hammer, anvil , stirrup.
Question 17. The maximum displacement of a vibrating objects from its mean position is called ............
Answer: amplitude
Question 18. SI unit of amplitude is ..........
Answer: metre.
Question 19. The time taken to complete a vibration by a vibrating body is called ............
Answer: time period.
Question 20. The SI unit of time period is ..............
Answer: second.
Question 21. The number of vibration completed by a vibrating body in one second is called .............
Answer: frequency.
Question 22. SI unit of frequency is ...........
Answer: hertz.
Question 23. Time period and frequency are ......... proportional to each other.
Answer: inversely
Question 24. The characteristics of sound are ............. , ................ and ....................
Answer: loudness, pitch and quality.
Question 25. If the amplitude of a sound is more then loudness of the sound is ...............
Answer: more.
Question 26. If the frequency of a sound is more the pitch of the sound is .............
Answer: more.
Question 27. The range of audible sound is ........ hertz to ............. hertz.
Answer: 20 hertz to 20000 hertz.
Question 28. The sound having frequency less then 20 hertz is called ............ .
Answer: infrasonic sound.
Question 29. The sound having frequency more then 20000 hertz is called ..............
Answer: ultrasonic sound.
Question 30. The unpleasant sound produce around us is called ..................
Answer: noise.
Question 31. The pleasant to our ear is called ............
Answer: music.
Question 32. Guitar is an example of ........... musical instrument.
Answer: string
Question 33. Drum is an example of .......... musical instrument.
Answer: membrane
Question 34. Trumpet is an example of ............ musical instrument.
Answer: wind
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