Activity 13.4 Class 8 Science Chapter 13 Solution

Activity 13.4 Class 8 Science Chapter Sound

 In this post, you will find NCERT Science Class 8 Chapter 13 activity 13.4 and after reading this, you can understand the meaning of sound, characteristics of sound, propagation of sound, properties of sound, and types of sound waves. You should also go through activity 13.5 of chapter 13.

We have already discussed the relation between vibration and sound in activity 13.4, now we will find which part of musical instruments produce sound.

Activity

·     Take a hollow coconut shell and make a musical instrument ektara.

·     You can also make it with the help of an earthen pot.

·     Play this instrument and identify its vibrating part.

     

Observation and Explanation

Musical instruments like ektara, and guitar has metal wires or strings to play music.

When a musician stretches these strings, vibrations are produced and we can hear melodious music.

So stretched strings are the vibrating part of ektara and other musical instruments.

We can see in the following video, the Guitar player is stretching the strings of the guitar that produces sound. 

 As we can see, the strings of the guitar are the vibrating parts.

Conclusion

We can conclude that stretched strings are the vibrating parts of musical instruments like ektara and guitar. 

Related Topics

1. Activity 13.3

2. Activity 13.5