This exam tips covers Exam Tips within Sound Waves for GCSE Physics. Revise Sound Waves in Waves for GCSE Physics with 13 exam-style questions and 15 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 12 of 13 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 12 of 13
Practice
13 questions
Recall
15 flashcards
💡 Exam Tips
🎯 Common Question Types:
- Describe features of an oscilloscope trace (1–2 marks)
- Calculate distance using echo method (2–3 marks)
- Explain why sound cannot travel through a vacuum (2 marks)
- Compare ultrasound and X-rays for medical imaging (4 marks)
📝 Key Command Words:
- Describe: What you observe on the trace (taller = louder)
- Explain: Give the physics reason (amplitude increases, so more energy)
- Calculate: Show the echo formula clearly with the ÷2 step
- Compare: State one similarity AND one difference
⚠️ Common Mistakes to Avoid:
- Forgetting to divide by 2 in echo distance calculations
- Saying sound is a transverse wave — it is LONGITUDINAL
- Confusing amplitude with wavelength on oscilloscope traces
- Saying ultrasound is "safer than X-rays" without explaining WHY (non-ionising)