A focused three-component revision and exam practice pack for SP4d, covering the complete Edexcel Separate Science Physics specification for waves at boundaries (SP4.9P, SP4.16P). Includes a 6-mark Level of Response question.

Topic Mastery Sheet covers all four processes at boundaries - reflection, refraction, transmission and absorption - with definitions and examples; the contrast between hard and soft surfaces for sound and the implications for room acoustics; and the relationship between velocity, frequency and wavelength when a wave crosses a boundary, including which quantities change and which remain constant.

Student Exam Practice Sheet includes a table-completion exercise on boundary processes, a question on the velocity/frequency/wavelength relationship at a boundary, and a 6-mark Level of Response question comparing sound behaviour in different room environments. Question structure matches the Edexcel test format.

Teacher Answer Key provides a complete mark scheme including the Level of Response indicative content and level descriptors, and guidance on how the velocity/frequency/wavelength question is awarded.

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