IGCSE Physics: Pitch & Loudness | Edexcel Modular | Unit 5 | L12

IGCSE Physics: Pitch & Loudness | Edexcel Modular | Unit 5 | L12

This lesson covers spec points 5.26P, 5.27P, 5.28P and 5.29P — how an oscilloscope displays sound, and how pitch relates to frequency and loudness relates to amplitude.

PowerPoint includes:
• Retrieval starter reviewing period and frequency from oscilloscope traces
• Direct Instruction (I Do) — pitch linked to frequency; loudness linked to amplitude; oscilloscope trace visualisations for all four combinations (high/low pitch × loud/quiet)
• Guided Practice (We Do) — three case studies: whisper vs bass drum trace identification; wave pattern MCQ; volume vs speed misconception check
• Independent Practice (You Do) — oscilloscope frequency measurement description; shouting vs talking trace change; guitar string pitch physics
• Digital audio context discussion (gain and pitch manipulation)
• Real-world application: string instruments (length, tension, mass)
• Review and Reflect unit summary exit ticket — final lesson of Unit 5

Activity Sheet includes:
• 2×2 grid of four labelled oscilloscope traces (A–D) for Q4 comparison task
• Side-by-side example wave and blank grid for Q8 sketching task
• 10 exam-style questions plus stretch covering pitch, loudness, oscilloscope method, and calculations
• Stretch question requires frequency calculation and comparison of both pitch and loudness
• Full mark scheme for teacher use