Easy1 markMultiple Choice
AQA GCSE · Question 04.3 · Waves
Earthquakes often occur at the Mariana Trench. P-waves and S-waves are produced by earthquakes. Which statement describes P-waves and S-waves?
Earthquakes often occur at the Mariana Trench. P-waves and S-waves are produced by earthquakes. Which statement describes P-waves and S-waves?
Answer options:
A.
Both P-waves and S-waves are longitudinal.
B.
Both P-waves and S-waves are transverse.
C.
P-waves are longitudinal and S-waves are transverse.
D.
P-waves are transverse and S-waves are longitudinal.
How to approach this question
Recall the definitions of the two types of seismic waves. One causes vibrations parallel to the direction of energy transfer, and the other causes vibrations perpendicular to it. Match P-waves and S-waves to the correct type of wave.
Full Answer
C.P-waves are longitudinal and S-waves are transverse.✓ Correct
P-waves are longitudinal and S-waves are transverse.
Seismic waves are the waves of energy caused by earthquakes. There are two main types that travel through the Earth's interior:
- **P-waves (Primary waves):** These are longitudinal waves. The vibrations of the rock particles are parallel to the direction of energy transfer. They are like sound waves, causing compressions and rarefactions. They are faster than S-waves and can travel through both solids and liquids.
- **S-waves (Secondary waves):** These are transverse waves. The vibrations of the rock particles are perpendicular (at right angles) to the direction of energy transfer. They are like waves on a rope. They are slower than P-waves and can only travel through solids.
Common mistakes
✗ Confusing the two types of waves.\n✗ Thinking both are the same type of wave.
Practice the full AQA GCSE Physics Higher Tier Paper 2
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