Orientation
Purpose: consolidate Module 3 by moving from recall to transfer. The review should check whether students can choose the model, state the constraint, and explain the physical meaning.
Retrieval Map
| Area | Fast check | Common repair |
|---|---|---|
| Wave properties | define v, f, lambda, T, A | separate source-controlled frequency from medium-controlled speed |
| Wave behaviour | reflection, refraction, diffraction, interference | state what changes and what stays constant |
| Sound | pitch, loudness, intensity, resonance | separate frequency, amplitude, intensity, and dB |
| Ray optics | real/virtual image, lens equation, magnification | align diagram evidence with calculation |
| Thermodynamics | heat, temperature, specific heat, latent heat | select $Q = mc\Delta T$ versus $Q = mL$ |
Mixed Practice Set
- A wave changes medium and slows down while its source frequency is unchanged. Explain what happens to wavelength.
- Light enters glass from air. Explain why the ray bends toward the normal.
- A sound becomes louder but the pitch is unchanged. Identify which physical quantity has changed and which has not.
- A convex lens forms an image that can be projected on a screen. State what type of image it is and how the ray diagram supports this.
- A block is heated but loses energy to the surrounding air. Explain why the measured input energy may be greater than $mc\Delta T$.
Exam-Style Writing Prompts
- Analyse: how reflection and refraction provide evidence that wave speed depends on the medium.
- Explain: why resonance can produce a large-amplitude standing wave.
- Evaluate: whether a simple thermal model is adequate for a heating experiment in an open classroom.
Maintenance Plan
After completion, Module 3 should enter weekly maintenance:
- one equation-choice item,
- one representation item,
- one misconception repair item,
- one short explanation sentence.