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Sound — Chapter Summary

ICSE · Class 7 · Physics

Summary of Sound for ICSE Class 7 Physics. Key concepts: Sound is produced when a body, Vibratory motion is and A tuning fork is a U.

70 questions38 flashcards6 formulas & key relations5 concepts

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Overview

Sound is a form of energy that produces the sensation of hearing in our ears. It is produced when a body vibrates, so every source of sound is a vibrating body. Sound needs a medium to travel, so it cannot travel through a vacuum. In air, sound moves as a longitudinal wave with compressions and rare

Key Concepts

Sound is produced when a body

Sound is produced when a body vibrates. When the vibration stops, the sound also stops. A vibrating ruler, string, drum membrane, tuning fork, and voc

Vibratory motion is an oscillatory motion

Vibratory motion is an oscillatory motion in which the body assumes a new shape during its motion. It is different from ordinary oscillation because t

A tuning fork is a U

A tuning fork is a U-shaped metallic piece with a stem in the middle. Its arms are called prongs. When struck gently on a rubber pad, the prongs vibra

The larynx is also called

The larynx is also called the voice box. It has vocal cords inside it. During breathing, the vocal cords are loose and the gap between them increases.

Sound cannot travel through a vacuum

Sound cannot travel through a vacuum. It needs a material medium such as solids, liquids, or gases to move from one place to another.

Learning Objectives

  • Identify different sources of sound
  • Describe sound as a longitudinal wave
  • Define amplitude, frequency, time period, and wavelength
  • Explain that sound requires a medium to propagate
  • Recognize reflection and absorption of sound

Frequently Asked Questions

What are the important topics in Sound for ICSE Class 7 Physics?
Key topics in Sound include Sound is produced when a body, Vibratory motion is an oscillatory motion, A tuning fork is a U, The larynx is also called. Study these first, then practise questions on each for Class 7 exams.
How should I revise Sound for Class 7 exams?
Learn the core ideas first, then work through the 70 practice questions on Sound. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Sound

All ICSE Class 7 Physics Chapter Summary

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