NCERT Solutions For Class 8 Science Chapter 10 Sound VSAQs

NCERT Solutions For Class 8 Science Chapter 10 Sound: Very Short Answer Questions

Question 1. How is the blind folded person able to guess which player is nearer to her?
Answer: The vibration due to the movement of a closer player is more than others, and the blind folded person can easily imagine in which direction a player is nearer to her.

NCERT Solutions for Sound VSAQs Class 8

Question 2. Briefly mention the experience when you touch a sound-producing school bell.
Answer: When we touch a sound-producing school bell, we feel the vibration in it.

Question 3. How does the sound propagate?
Answer: Sound needs a medium for propagation.

Question 4. Is it possible that the decreasing amount of air in the tumbler had something to do with the decreasing loudness of the ring?
Answer: Yes, if the amount of air starts decreasing in the tumbler, then the loudness of the ring also decreases.

Question 5. Does sound travel in liquids?
Answer: Yes, sound can travel through liquids.

NCERT Solutions for Class 8 Science Sound VSAQs

Question 6. Can you say that sound can travel through strings?
Answer: Yes, Sound can travel through strings.

Question 7. How can we hear sound through solids, liquids, and gases?
Answer: Sound travels faster in solids compared to liquids and gases because the particles in solids are much closer together than in liquids and gases.

Question 8. If an object oscillates 20 times in 1s, what would be its frequency?
Answer: As we know, the frequency is the total number of oscillations in 1 s. So, the frequency will be 20 Hz.

Question 9. How is it possible that you can recognise many familiar sounds without seeing the objects producing them?
Answer: We can recognise many familiar sounds of objects without seeing them because different objects produce different sounds.

NCERT Solutions for Sound Chapter 10 VSAQs

Question 10. What factors make the sound differ from each
Answer: Amplitude and frequency

Question 11. Is there any difference between the sound of a baby and that of an adult?
Answer: Yes, the frequency of the sound of a child is higher than that of an adult.

Question 12. Why is your voice different from that of your teacher?
Answer: This is because of the sound.

Question 13. Can we hear the sound of all vibrating bodies?
Answer: A sound is audible to us only if the sound produced by the vibrating body is in the audible range, i.e., 20 Hz to 20 kHz.

Class 8 Science Chapter 10 Sound Very Short Answer Questions

Question 14. Is the sound always pleasing?
Answer: No

Question 15. Can you list some sources of noise pollution?
Answer: Sounds of vehicles, bursting crackers, loudspeakers, etc.

Question 16. Name the sources in the home that may lead to noise.
Answer: The sources that may lead to the noise are transistors, radio at high volume, television, desert coolers, air conditioners, etc.

Sound Class 8 VSAQs and Answers

Question 17. How can the noise pollution be controlled in a Residential area?
Answer: The following steps should be taken to control noise pollution in a residential area

1. The television and loudspeaker should be run at low volumes.
2. Silencing devices must be installed in the transport vehicles, like tractors, trucks, etc.
3. Industries should be set up away from the residential areas.