Sound MCQ Questions Class 8 Science Chapter 13
NCERT MCQ Questions for Class 8 Science Chapter 13 Sound. Sound MCQ Questions with Answers from Class 8 Science.
Sound MCQ Questions Class 8 Science Chapter 13
Sound Multiple Choice Questions with Answers Class 8 Science Chapter 13 PDF is available.
1.) ____ is produced by vibrating objects ?
a) Wave
b) Sound
Ans. b) Sound
2.) In human beings , the vibration of the _____ produces sound ?
a) Vocal cords
b) Windpipes
Ans. a) Vocal cords
3.) The vocal cords in men are about _____ mm long ?
a) 20
b) 15
Ans. a) 20
4.) The vocal cords in women are about _____ mm long ?
a) 20
b) 15
Ans. b) 15
5.) Sound travels through ____ ?
a) Water only
b) Vacuum
c) Liquid , gas & solid
Ans. c) Liquid , gas & solid
6.) The number of oscillations per second is called ______ of oscillation ?
a) Frequency
b) Amplitude
Ans. a) Frequency
7.) The unit of frequency is ____ ?
a) Decibel
b) Hertz
Ans. b) Hertz
)The unit of loudness is _____ ?
a) Decibel
b) Hertz
Ans. a) Decibel
9.) Above _____ db the noise becomes physically painful ?
a) 70
b) 80
c) 60
Ans. b) 80
10.) The loudness of sound depends on its ____ ?
a) Frequency
b) Amplitude
Ans. b) Amplitude
11.) When the amplitude of vibration is large , the sound produced is _____ ?
a) Loud
b) Feeble
Ans. a) Loud
12.) When the amplitude of vibration is small , the sound produced is _____ ?
a) Loud
b) Feeble
Ans. b) Feeble
In case you are missed :- Previous Chapter MCQ Questions
13.) The frequency determines the ____ of a sound ?
a) Pitch
b) Loudness
Ans. a) Pitch
14.) If the frequency of vibration is ____ , the sound is shrill and has a higher pitch ?
a) Higher
b) Lower
Ans. a) Higher
15.) If the frequency of vibration is ____ , the sound has a lower pitch ?
a) Higher
b) Lower
Ans. b) Lower
16.) A drum vibrates with a ____ frequency ?
a) Low
b) High
Ans. a) Low
17.) A whistle has a _____ frequency ?
a) Low
b) High
Ans. b) High
18.) A bird makes a _____ sound ?
a) High-pitched
b) Low-pitched
Ans. a) High-pitched
19.) A lion makes a _____ roar ?
a) High-pitched
b) Low-pitched
Ans. b) Low-pitched
20.) The range of audible frequencies is roughly from _____ ?
a) 20 to 20,000 Hz
b) 30 to 30,000 Hz
Ans. a) 20 to 20,000 Hz
21.) The ultrasound equipment works at frequencies _____ than 20,000 Hz ?
a) Higher
b) Lower
Ans. a) Higher
22.) The unpleasant sounds are called ____ ?
a) Pitch
b) Noise
Ans. b) Noise
23.) Impairment of hearing is caused by ____ pollution ?
a) Air
b) Noise
Ans. b) Noise
24.) _____ can reduce noise pollution ?
a) Plantation on the roadside
b) Reduce the use of vehicle
Ans. a) Plantation on the roadside
25.) _____ sends vibrations to the inner ear ?
a) Larynx
b) Eardrum
Ans. b) Eardrum
In case you are missed :- Next Chapter MCQ Questions