Sound Class 8 Notes – Chapter 13
Sound plays an important role in our life. It is through sound we know that a period in school is over or if someone is approaching you by just listening to the footsteps. Vibrating objects produce sound. Vibration is the to and fro or back and forth movement of an object. Sound needs a medium to travel. Hence, it cannot travel in a vacuum. Please refer Sound Class 8 Notes for more revision notes.
CBSE Revision Notes 