Activity 13.10 Class 8 Science Chapter 13 Solution

Activity 13.10 Class 8 Science Chapter Sound

 In this post, you will find NCERT Science Class 8 Chapter 13 activity 13.10 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 13.11 of chapter 13.

Activity

   ·     Take a plastic or tin can.

   ·      Cut its ends.

   ·     Stretch a piece of rubber balloon across one end of the can and fasten it with a rubber band.

   ·     Put four or five grains of dry cereal on the stretched rubber.

   ·     Now ask your friend to speak “Hurray,

  ·     Hurray” from the open end.

  ·      Observe what happens to the grain.

  ·      Why do the grains jump up and down?

       

 Activity 13.10 Class 8 Science Chapter 13 Solution

Observation and explanation

When we speak ‘hurray’ from the open end of the can, the piece of the balloon begins to move up and down so the grains on the piece of the balloon also jump up and down.

The sound waves strike the piece of balloon and produce vibrations.

In the same manner, our eardrum moves back and forth rapidly when sound waves strike it.

Conclusion

 The activity shows the function of the eardrum 

Related Topics

1. Activity 13.11