A focused three-component revision and exam practice pack for SP4g, covering the complete Edexcel Separate Science Physics specification for infrasound and seismic waves (SP4.14P, SP4.15P). All content is Higher tier.

Topic Mastery Sheet covers the definition of infrasound and its frequency range; the properties of P-waves and S-waves and why they differ in what they can travel through; how the pattern of seismic wave detection around the world is used to determine the internal structure of the Earth; and how to identify P-waves and S-waves on a wave speed versus depth graph. The key deduction from the S-wave shadow zone is covered in detail.

Student Exam Practice Sheet includes a multiple choice question on infrasound, a five-part graph analysis question on P-wave and S-wave behaviour at different depths, and a question explaining how S-waves reveal information about the Earth’s interior. All questions are Higher tier and match the Edexcel unit test format.

Teacher Answer Key provides a complete mark scheme with specific guidance on the two marks required for the P-wave identification question and the reasoning required for the core question about the Earth’s internal structure.

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