ScienceWaves, Light & SoundAges 11–12

How Sound Waves Travel

Explain that sound is produced by vibrating objects and travels as a longitudinal pressure wave through solids, liquids, and gases; describe reflection of sound (echoes) and absorption; explain why sound cannot travel through a vacuum

Lesson

Set out your lesson

Practise the bounded task in How Sound Waves Travel; see exact limits before inferring broader coverage.

Before teaching

Use this short check, then start teaching.

Activity

Knows vibrating means back-and-forth motion; avoid loud sounds and ear-level demonstrations.

Policy

Exact directed source edges retained; earlier authorship is not learner attainment.

Printer, credit, and teaching notes

Exact directed source edges retained; earlier authorship is not learner attainment.

Materials

These supplied stage cards
Scrap paper and pencil; oral/pointing response where appropriate

Sequence

Read readiness and decide on support without treating prerequisite authoring as learner readiness.
Open Show first and explain its model.
Use Guided Try with support and its separate adult key.
Close Show and guided keys before Try, unless this Try is explicitly supported.
Reflect on an actual attempt, including help used.

No Printer

Use the supplied screen cards; copying the exact task to paper is optional, not required.

Privacy

Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.

Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view.

Next: Show

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Teaching approaches

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1 approach

Selected Default Gakuva

Practise the bounded task in How Sound Waves Travel; see exact limits before inferring broader coverage.

Family records and proof options

Keep a record of your learning

Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.

View learner plans ($12/mo per learner) See sample family archive

Learning resources

Extra practice links — they do not replace Gakuva’s teaching approach.

PhET Interactive Simulations · Practice link — not the full lesson

Sound Waves

Open practice(new tab)

Before you open · source notes

Sound Waves supports hands-on exploration for How Sound Waves Travel. Not every lab worksheet.

Free interactive page, no sign-in required for the tested path.

Before you open

Ask the learner what they changed in the sim or page and what they observed.

Opening this link does not save learning or assess mastery.

Source, access and review notes

Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.

PhET Interactive Simulations. “Sound Waves.” External page; Gakuva does not copy, host, embed, or redistribute materials.

Unknown — link only

Check understanding

Explains how a vibrating object creates regions of compression and rarefaction in air
Explains why sound travels fastest in solids and cannot travel in a vacuum
Describes how an echo is produced and gives a practical application (sonar, ultrasound)
Explains what sound absorption means and why soft furnishings reduce echoes

“If your child heard an echo in a large empty hall, could they explain what causes the echo, why the same sound in a carpeted living room doesn’t echo, and what would happen to sound in outer space?”

Curriculum record

Type: Conceptual
Subject: Science
Domain: Waves, Light & Sound
Age range: Ages 11–12

Standards

uk-nc-2013:KS3.Sci.Phys.Waves.3