Q1
How is sound produced?
ABy vibrations
BBy light
CBy heat
DBy magnetism
ICSEClass 7 (ICSE)ScienceCh 6 · Topic 2
Practice and Revision - Sound
Let us practise and revise what we learned about sound. Sound is a form of energy produced by vibrations, travelling through a medium like a
Core concept
Sound is produced when an object vibrates, creating waves that travel through a medium like air to reach our ears.
How it works
Sound cannot travel through a vacuum (empty space) since it needs a medium (solid, liquid, or gas) to travel through.
Why it matters
The pitch of a sound depends on frequency (higher frequency means higher pitch), while loudness depends on amplitude.
Key detail
Understanding sound helps us explain how musical instruments work, how we hear, and phenomena like echoes.
Exam highlight
Key diagram
Keywords worth remembering
Trending
soundicse class 7
Most searched
ICSE class 7 sound
Quick revision
Study resources
Notes & downloads
Quick notes
• Sound is produced by vibrations.
• Sound waves travel through a medium.
• Sound cannot travel through a vacuum.
• It needs air, water or solids to travel.
• Pitch depends on frequency.
• Higher frequency means higher pitch.
• Loudness depends on amplitude.
• Sound explains instruments, hearing and echoes.