Class 8 Science Chapter 10 Sound MCQs- Here, we will share Class 8 Science Chapter 10 Sound MCQs. If you are searching for Class 8 Science Chapter 10 Sound MCQs, you are at the right place. queryexpress provides the best MCQs on Class 8 Science from your Exam point of view.
Class 8 Science Chapter 10 Sound MCQs
How is the sound produced?
- a) By stationary objects
- b) By vibrating objects
- c) By changing temperatures
- d) By light waves
Answer: b) By vibrating objects
2. Which part of the human body produces sound?
- a) Lungs
- b) Heart
- c) Voice box (larynx)
- d) Nose
Answer: c) Voice box (larynx)
3. What happens to the sound when the amplitude of the vibration increases?
- a) The sound becomes softer
- b) The sound becomes louder
- c) The pitch decreases
- d) The frequency decreases
Answer: b) The sound becomes louder
4. What is the unit of frequency?
- a) Decibel
- b) Hertz
- c) Meter
- d) Pascal
Answer: b) Hertz
5. What is the range of audible sound frequencies for the human ear?
- a) 20 Hz to 20,000 Hz
- b) 10 Hz to 10,000 Hz
- c) 50 Hz to 100,000 Hz
- d) 1 Hz to 1,000 Hz
Answer: a) 20 Hz to 20,000 Hz
6. Which property of sound determines its pitch?
- a) Amplitude
- b) Frequency
- c) Loudness
- d) Wavelength
Answer: b) Frequency
7. Which type of sound has a high pitch?
- a) Lion’s roar
- b) Drumbeat
- c) Bird chirp
- d) Thunder
Answer: c) Bird chirp
8. Which medium cannot transmit sound?
- a) Air
- b) Water
- c) Vacuum
- d) Wood
Answer: c) Vacuum
9. How can noise pollution be reduced in residential areas?
- a) Planting trees along roads
- b) Increasing vehicle horns
- c) Running loud music systems
- d) Using louder home appliances
Answer: a) Planting trees along roads
10. Which of the following is an example of a source of noise pollution?
- a) Harmonica
- b) TV at high volume
- c) Birdsong
- d) Whispering
Answer: b) TV at high volume
11. What effect does continuous exposure to loud sound have on humans?
- a) Enhanced hearing ability
- b) Temporary or permanent hearing impairment
- c) Faster reflexes
- d) Improved concentration
Answer: b) Temporary or permanent hearing impairment
12. What is the loudness of normal conversation in decibels?
- a) 10 dB
- b) 30 dB
- c) 60 dB
- d) 80 dB
Answer: c) 60 dB
13. Which animal can hear sounds of frequencies higher than 20,000 Hz?
- a) Cat
- b) Dog
- c) Elephant
- d) Human
Answer: b) Dog
14. How do we hear sound?
- a) Through our skin
- b) Through the eardrum vibrating
- c) Through bones in our hands
- d) Through the windpipe
Answer: b) Through the eardrum vibrating
15. What is noise pollution?
- a) Excessive unwanted sounds in the environment
- b) Low frequency sounds
- c) Sounds produced by musical instruments
- d) Pleasant sounds
Answer: a) Excessive unwanted sounds in the environment
16. What causes the sound to be produced?
- (a) Motion
- (b) Vibration
- (c) Heat
- (d) Pressure
Answer: (b) Vibration
17. Which part of the human body is responsible for producing sound?
- (a) Lungs
- (b) Ears
- (c) Voice box (Larynx)
- (d) Nose
Answer: (c) Voice box (Larynx)
18. What is the frequency of sound measured in?
- (a) Seconds
- (b) Hertz (Hz)
- (c) Decibels (dB)
- (d) Watts
Answer: (b) Hertz (Hz)
19. What range of sound frequency can humans hear?
- (a) 20 Hz to 20 kHz
- (b) 200 Hz to 2000 kHz
- (c) 10 Hz to 50 Hz
- (d) 100 kHz to 200 kHz
Answer: (a) 20 Hz to 20 kHz
20. The loudness of a sound depends on which property?
- (a) Frequency
- (b) Amplitude
- (c) Wavelength
- (d) Pitch
Answer: (b) Amplitude
21. Which sound will have a higher pitch?
- (a) Lion’s roar
- (b) Bird’s chirp
- (c) Drum beat
- (d) Guitar string
Answer: (b) Bird’s chirp
22. What happens to the eardrum when sound waves hit it?
- (a) It vibrates
- (b) It melts
- (c) It stops functioning
- (d) It stiffens
Answer: (a) It vibrates
23. What is the unit of measurement for the loudness of sound?
- (a) Hertz
- (b) Newton
- (c) Decibel
- (d) Meter
Answer: (c) Decibel
24. What type of sound is pleasant to the ear?
- (a) Noise
- (b) Music
- (c) Screeching
- (d) Shouting
Answer: (b) Music
25. How can noise pollution affect human health?
- (a) Cause improved hearing
- (b) Increase in appetite
- (c) Cause sleep disturbances
- (d) Improve concentration
Answer: (c) Cause sleep disturbances
26. Which of the following can help in controlling noise pollution?
- (a) Planting trees
- (b) Blowing horns more often
- (c) Playing loud music
- (d) Using more vehicles
Answer: (a) Planting trees
27. What is the main cause of sound pollution in residential areas?
- (a) Birds chirping
- (b) Traffic and industrial noise
- (c) Running water
- (d) Natural winds
Answer: (b) Traffic and industrial noise
28. What type of waves are sound waves?
- (a) Transverse
- (b) Longitudinal
- (c) Electromagnetic
- (d) Tidal
Answer: (b) Longitudinal
29. Which device helps people with hearing impairments?
- (a) Hearing aids
- (b) Telescope
- (c) Microphone
- (d) Speaker
Answer: (a) Hearing aids
30. Which property of sound is responsible for the pitch?
- (a) Amplitude
- (b) Frequency
- (c) Wavelength
- (d) Speed
Answer: (b) Frequency