P-waves and S-waves are seismic (earthquake) waves - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1
Question 6
P-waves and S-waves are seismic (earthquake) waves.
The table has six statements about P-waves and S-waves.
Put a tick (✓) in the box next to the three correct state... show full transcript
Worked Solution & Example Answer:P-waves and S-waves are seismic (earthquake) waves - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1
Step 1
P-waves are transverse waves
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Answer
This statement is false. P-waves (Primary waves) are longitudinal waves, meaning they compress and expand in the same direction as the wave travels.
Step 2
S-waves are transverse waves
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Answer
This statement is true. S-waves (Secondary waves) are transverse waves that move perpendicular to the direction of wave travel.
Step 3
P-waves travel faster than S-waves in the Earth’s crust
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Answer
This statement is true. P-waves travel faster than S-waves, making them the first waves detected by seismographs.
Step 4
P-waves can travel through the liquid core of the Earth
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Answer
This statement is true. P-waves can travel through both solid and liquid, which is why they can travel through the Earth’s liquid outer core.
Step 5
S-waves can travel through the liquid core of the Earth
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Answer
This statement is false. S-waves cannot travel through liquids, which is why they do not pass through the Earth’s liquid outer core.
Step 6
The frequency of ultrasound is
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A. more than 20000 Hz. Ultrasound is defined as sound waves with frequencies above 20,000 Hz.
