This common misconceptions covers Common Misconceptions within Seismic Waves for GCSE Physics. Revise Seismic Waves in Waves for GCSE Physics with 13 exam-style questions and 15 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 9 of 14 in this topic. Use this common misconceptions to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 14
Practice
13 questions
Recall
15 flashcards
⚠️ Common Misconceptions
Misconception 1: "S-waves are blocked by the whole core"
S-waves are blocked by the liquid outer core only. The inner core is solid, but S-waves never reach it because they are already blocked at the outer core boundary. If the whole core were solid, S-waves would pass through it. The fact that they don't reach the far side is specifically evidence that the outer core is liquid.
Misconception 2: "P-waves travel in straight lines through Earth"
P-waves continuously refract (curve) as they travel through Earth because density changes gradually with depth. Their paths are curved, not straight. They also refract sharply at boundaries (like the core-mantle boundary). It is this combination of curving and sharp refraction that creates the P-wave shadow zone.
Misconception 3: "We can only tell two things about Earth's interior from seismic waves"
Seismic wave data tells scientists: (1) that the outer core is liquid (from S-wave shadow zone), (2) that the inner core is solid (from P-wave travel times), (3) the approximate depth of each layer (from when waves arrive), (4) the density of each layer (from wave speeds), and (5) changes in composition at boundaries.
Keep building this topic
Read this section alongside the surrounding pages in Seismic Waves. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Seismic Waves
What type of wave is a P-wave (primary seismic wave)?
State two differences between P-waves and S-waves in terms of how the particles move and what materials they can travel through.
Quick Recall Flashcards
13 questions on Seismic Waves — practise free
Instant marking, adaptive difficulty, and 15 spaced repetition flashcards. Free until your GCSEs.
Try PrepWise Free