Activity 13.3 Class 8 Science Chapter 13 Solution

Activity 13.3 Class 8 Science Chapter Sound

 In this post, you will find NCERT Science Class 8 Chapter 13 activity 13.3 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 13.4 of chapter 13.

You are suggested to study NCERT activity 13.3 class 8 science explanation with a conclusion so that you can attempt questions based on activity 13.3 class 8 science.

Activity 13.3 Class 8 Science

 

   ·     Take a metal dish.

   ·     Pour water in it.

   ·     Strike it at its edge with a spoon.

   ·     Do you hear a sound?

   ·     Again strike the dish and then touch it.

   ·     Can you feel the dish vibrating?

   ·     Strike the dish again.

   ·     Look at the surface of the water.

   ·     Do you see any waves there?

   ·     Now hold the dish.

   ·     What change do you observe on the surface of the water?

   ·     Can you explain the change?

   ·     Is there a hint to connect sound with the vibrations of a body?

      

Activity 13.3 Class 8 Science Chapter 13 Solution

Observation and explanation

When we strike the metal dish with a spoon, we can hear sound.

Again, we strike the dish and touch its surface, and we can feel vibrations.

Now we strike the dish again, and we can see waves in the water.

When we strike the dish and hold it, we can’t hear a sound, feel a vibration and see waves in the water.

It so happened because waves are produced due to disturbance. But when we hold the dish, the disturbance stops.

Conclusion

This activity shows the relation between the vibration of the body and sound. All vibrating bodies produce sound.

Related Topics

1. Activity 13.4

2. Activity 13.2