Class 8 Sound CBSE Questions & Answers

Class 8 · Sound

This is Science Class 8 Sound CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Sound cannot travel through
  • A
    Air
  • B
    Water
  • C
    Solids
  • D
    Vacuum
    Correct
2
Sound helps us to
  • A
    Identify one another
  • B
    Group each other
  • C
    Communicate with one another
    Correct
  • D
    View each other
3
Sound is produced by
  • A
    Cooling
  • B
    Heating
  • C
    Moving
  • D
    Vibration
    Correct
4
Speed of sound increase with
  • A
    Decrease in temperature
  • B
    All of the above
  • C
    Increase in temperature
    Correct
  • D
    Decrease in humidity
5
When a tightly stretched band is plucked it
  • A
    Produce sound but do not vibrate
  • B
    Vibrate but do not produce sound
  • C
    Only oscillate to and fro
  • D
    Vibrate and produce sound
    Correct
6
Which of the following factor influence speed of sound most?
  • A
    Humidity
  • B
    Nature of medium
    Correct
  • C
    Source of sound
  • D
    Temperature
7
Which of the following require material medium for propagation?
  • A
    Light
  • B
    All of these
  • C
    Transverse wave
  • D
    Sound
    Correct
8
In most of the cases vibration of objects are not visible because
  • A
    Amplitude is very small
    Correct
  • B
    Wavelength is very small
  • C
    Frequency is very less
  • D
    Wavelength is very large
9
Loudness of sound depends upon its
  • A
    Wavelength
  • B
    Amplitude
    Correct
  • C
    Time-period
  • D
    Frequency
10
Vibrating part of flute is
  • A
    Rubber band
  • B
    Stretched membrane
  • C
    Air-column
    Correct
  • D
    String
11
Sound of single frequency is called a
  • A
    Noise
  • B
    Music
  • C
    Tone
    Correct
  • D
    Note
12
The shape of the outer part of human ear is like a
  • A
    Dumbbell
  • B
    Funnel
    Correct
  • C
    Frustum
  • D
    Drum
13
In which medium sound travels faster?
  • A
    Metals
    Correct
  • B
    Water
  • C
    Air
  • D
    Same in all medium
14
Which of the following travels fastest?
  • A
    Light
    Correct
  • B
    Rockets
  • C
    Sound
  • D
    Supersonic aircraft
15
In human beings, sound is produced due to vibration of
  • A
    Teeth
  • B
    Vocal cords
    Correct
  • C
    Tongue
  • D
    Lips