Class 8 Sound ICSE (Set 1)

Sound Chapter – MCQ Test (25 Questions)

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1. Sound is produced when an object:
A) Moves slowly
B) Vibrates
Is heated
Is cooled

2. Sound can travel through:
Vacuum
Only air
Solids, liquids and gases
Only solids

3. Sound travels fastest in:
Air
Water
Iron
Vacuum

4. Sound travels slowest in:
Water
Air
Steel
Wood

5. Unit of frequency:
Metre
Second
Hertz
Decibel

6. Loudness depends on:
Frequency
Amplitude
Speed
Wavelength

7. Pitch depends on:
Amplitude
Frequency
Speed
Medium

8. No. of vibrations per sec is:
Amplitude
Time period
Frequency
Wavelength

9. Human hearing range:
20–20,000 Hz
10–10,000 Hz
50–50,000 Hz
100–100,000 Hz

10. Above 20,000 Hz is:
Infrasound
Ultrasound
Audible
Noise

11. Woman’s voice is:
Louder
Deeper
Shriller
Same

12. Pleasant sound:
Noise
Music
Tone
Echo

13. Loud unpleasant sound:
Music
Noise
Echo
Vibration

14. Minimum duration to hear sound:
0.1 sec
1 sec
0.01 sec
10 sec

15. Minimum distance for echo:
10 m
17 m
34 m
50 m

16. Echo is caused by reflection from:
Wall/hill
Water
Vacuum
Air particles

17. Doctors use:
Telescope
Microscope
Stethoscope
Periscope

18. Below 20 Hz is:
Ultrasound
Infrasound
Audible
Music

19. One vibration time:
Frequency
Amplitude
Time period
Wavelength

20. Dogs can hear:
Low sounds
High sounds
Ultrasound
None

21. Maximum displacement is:
Frequency
Wavelength
Amplitude
Time period

22. Animal hearing infrasound:
Dog
Bat
Elephant
Human

23. Speed of sound in air:
340 m/s
3400 m/s
34 m/s
3,40,000 m/s

24. Sound cannot travel through:
Water
Steel
Air
Vacuum

25. We cover ears during thunder to avoid:
Loud noise
Rain
Lightning
Wind

🎉 Test Result 🎉