Sound Travels

WALT (We Are Learning To)

• Understand how sound travels through different mediums: air, water, and solids.
• Conduct simple experiments to observe sound transmission.
• Identify factors that affect the speed and clarity of sound.

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National Curriculum Links (England)

Subject: Science
Key Stages: KS2 (Years 5-6), KS3 (Years 7-8)
Programme of Study References:

• KS2:
  “Identify how sounds are made, associating some of them with something vibrating.”
  “Find patterns between the pitch of a sound and features of the object that produced it.”
  “Recognise that vibrations from sounds travel through a medium to the ear.”
  (Key Stage 2 Science Programme of Study – Animals, including humans; physics: sound)

• KS3:
  “Sound waves are longitudinal waves caused by vibrations and travel through a medium.”
  “Describe (qualitatively) the speed of sound in air, water, and solids.”
  “Investigate how materials affect sound transmission.”
  (Key Stage 3 Science Programme of Study – Physics: waves)

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Success Criteria

By the end of this lesson, students will be able to:

• Explain how sound travels through air, water, and solids.
• Describe differences in how sound is transmitted through these mediums.
• Successfully carry out a comparative experiment on sound transmission.
• Discuss factors that influence sound travel with growing scientific vocabulary.

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Lesson Duration

30 minutes
Class Size: 8 students

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Resources

• Tuning forks or small bells
• Rubber bands and wooden rulers
• Bowls of water
• Metal spoon or metal rods
• Stopwatch or timer
• Worksheets with dyslexia-friendly fonts and layouts
• Whiteboard with large, clear writing
• Visual aids illustrating sound waves in different media

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Lesson Structure

1. Introduction (5 minutes)

• Brief recap of “What is sound?” from previous lessons: Sound comes from vibrations.
• Introduce WALT and success criteria. Use simple language and visual WALT chart.
• Show how sound needs a medium to travel — no sound in space! Use a visual animation or illustration.
• Use real-life examples (e.g., hearing someone talking through a door, underwater sounds, knocking on a table).

Differentiation: Present summary points visually and verbally; allow students to whisper the key points in pairs to encourage engagement.

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2. Class Experiment (15 minutes)

Experiment 1: Sound through Air vs Water vs Solids

• Step 1: Plunge a vibrating tuning fork into water and place it next to each student’s ear (carefully, using a towel to dry). Ask: What do they notice? Is the sound clear or muffled?
• Step 2: Tap a metal spoon gently on a wooden table — students place their ear against the table.
• Step 3: Hold the vibrating tuning fork next to their ear with no medium other than air.

Ask students to record in their worksheet:

Medium	Sound Heard (Loud/Soft)	Description (Clear/Muffled)	Time Delay (if any)

• Group Discussion: What differences did they hear? Why did sound behave differently?

Support for SEN (ADHD, Autism, FASD, ODD):

• Clear, concise instructions with visual steps.
• Allow students who need it short breaks or sensory options (ear defenders, fiddle toys).
• Partner work for guidance and reassurance enhances focus.

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3. Concept Discussion (7 minutes)

• Use visual diagrams showing sound vibrations moving through air particles, water particles, and solids.
• Introduce vocabulary: vibrations, medium, particles, transmission, amplitude.
• Discuss which medium made sound travel fastest or slowest and why (particles closer in solids make sound travel faster).
• Link to everyday examples: Why can we hear a train on the rails before seeing it?

Extension for Advanced Learners:

• Discuss quantitative differences in speed of sound: approx. 343 m/s in air, 1482 m/s in water, 5000 m/s in steel.
• Introduce waveform graphs showing longitudinal waves.

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4. Plenary and Reflection (3 minutes)

• Ask students to share one new thing they learned about sound travel.
• Quick quiz: "Which medium allows sound to travel fastest?"
• Emphasise the importance of medium in sound transmission.
• Highlight success criteria again, allow self-assessment with thumbs up/down.

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Differentiation & Inclusion

Learner Need	Strategy
Dyslexia	Use dyslexia-friendly fonts and worksheets; colour coding; verbal instructions to accompany written.
Autism / ADHD / FASD / ODD	Structured routine with clear, simple instructions; visual aids to support understanding; sensory breaks; small group work for comfort.
Advanced learners	Provide extension tasks exploring the physics of wave speed; introduce related concepts (pitch and frequency).
EAL (English as Additional Language)	Use visuals, gestures and simple sentences; peer support; glossary of key terms with pictures.

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Assessment

• Formative assessment through observation during the experiment and group discussion.
• Worksheet completion assessed for understanding of sound transmission concepts.
• Self-assessment using success criteria checklist and plenary quiz responses.

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Extension Activities (Optional Homework or Club Work)

• Investigate how soundproofing works in homes or schools.
• Build a simple string telephone with cups and string to explore vibrations in solids air transmission.
• Research how animals use sound underwater (e.g., dolphins).
• Create posters illustrating how sound travels through different media.

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This lesson is designed to engage all students with hands-on activities and discussion, promoting understanding supported by clear curriculum links and inclusivity strategies.