*Full Lesson* Physics: Transverse and Longitudinal waves.

This is the first lesson of a unit of work on sound. It is aimed towards KS3 but could be adapted for other levels. The main aim of the lesson is to introduce pupils to transverse and longitudinal waves and their main features and properties.

For a bundle of all five lessons in this unit, click here.

During this lesson pupils will:

• Complete an ISM activity discussing the speed of light vs the speed of sound.
• Suggest how sound and light travel from one place to another to test pupil prior knowledge.
• Introduce and define the concept of wave in terms of energy.
• Investigate the difference between transverse and longitudinal wave.
• Draw and label a transverse wave, defining the key features, Wavelength, amplitude, peak, trough and frequency.
• Draw and label a longitudinal wave defining the key features, rarefaction and compression.
• Model transverse and longitudinal waves using a slinky.
• Briefly investigate absorption, transmission and reflection of waves.
• Draw a ray diagram showing incident and reflected waves.
• Briefly investigate superposition of waves.
• Complete a short knowledge consolidation task.

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