What is Sound in Year 4 Science (KSSR)?
Sound is produced by vibrations — all vibrating objects produce sound. Sound intensity is measured in decibels (dB); loud sounds (>85 dB) can damage hearing.
Chapter Summary
Sound is produced by vibrations — all vibrating objects produce sound. Sound intensity is measured in decibels (dB); loud sounds (>85 dB) can damage hearing. Sound can be absorbed by soft materials like carpet and cork, and reflected by hard surfaces like stone walls.
What You Will Learn
- Sound is produced by vibrations
- Sources of sound in daily life
- Loud, moderate and soft sounds
- Sound measured in decibels (dB)
- Effects of noise pollution on health
- Sound absorption and reflection
- Sound-absorbing materials (carpet, cork)
7 topics with full-colour infographic notes + labelled diagrams
Unlock Chapter 6 — RM19 →or Try Chapter 1 for Free firstSample Question (Free)
1 of 8 questionsHow is sound produced?
- From the vibration of objects✓ Correct answer
- From the movement of light
- From air pressure alone
- From heat released
+7 more questions for this chapter
80 interactive quiz questions across 10 chapters
Frequently Asked Questions
How is sound produced?
From the vibration of objects.
What is taught in the Sound chapter of Year 4 Science?
Sound is produced by vibrations — all vibrating objects produce sound. Sound intensity is measured in decibels (dB); loud sounds (>85 dB) can damage hearing. Sound can be absorbed by soft materials like carpet and cork, and reflected by hard surfaces like stone walls.
What are the main topics in Sound?
Main topics: Sound is produced by vibrations; Sources of sound in daily life; Loud, moderate and soft sounds; Sound measured in decibels (dB); Effects of noise pollution on health; Sound absorption and reflection; Sound-absorbing materials (carpet, cork).
Confused by a science term? Check the Year 4 Science Glossary (340+ terms) →