NCERT Class 8 Science Science: Chapter 10 — Sound
This chapter, 'Sound,' from NCERT Class 8 Science, explores the fundamental nature of sound. It begins by highlighting the importance of sound in our daily lives, particularly for communication, and prompts students to identify various sounds in their surroundings. The chapter then delves into the production of sound, explaining that sound is produced by vibrating bodies. Through engaging activities like plucking a rubber band, striking a metal plate, and observing water ripples, students learn to connect sound with vibrations. It also touches upon how sound travels and the factors influencing its loudness, setting the stage for further exploration of sound phenomena in physics. This foundational understanding is crucial for CBSE students learning about waves and acoustics.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 8 |
| Subject | Science |
| Book | Science |
| Chapter | Chapter 10 — Sound |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 3 minutes |
| Word count | 506 |
Learning outcomes
- Understand the role of sound in daily life and communication.
- Identify that sound is produced by vibrating objects.
- Relate vibrations to the production of sound through practical activities.
- Recognize the connection between sound and the motion of objects.
Vocabulary
| Word | Meaning |
|---|---|
| Vibration | The rapid back and forth motion of an object. |
| Sound | A form of energy that travels as waves and is perceived by the ear. |
| Musical instruments | Devices used to produce musical sounds. |
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Practice questions
- How do we know that a period is over in school? Answer: We hear the school bell.
- What is vibration? Answer: The to and fro or back and forth motion of an object is called vibration.
- Name two musical instruments mentioned in the chapter. Answer: Flute, tabla, harmonium, sitar.
- What happens when a vibrating body stops vibrating? Answer: It does not produce any sound.
Frequently asked questions
What is the main role of sound in our lives?
Sound plays an important role in our lives, primarily helping us to communicate with one another.
How can we tell if an object is producing sound?
We can often feel the vibrations of an object when it produces sound.
What is the definition of vibration?
Vibration is defined as the to and fro or back and forth motion of an object.
What happens to sound production when a vibrating body stops vibrating?
When a vibrating body stops vibrating, it stops producing sound.
What is observed on the surface of water when a vibrating dish is struck?
Waves are observed on the surface of the water when a vibrating dish is struck.
Related resources
Important topics
Topics covered
NCERT Class 8 Science — Science — Chapter 10 — Sound. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.