EARTH SCIENCE
EARTHQUAKES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How do rock particles move during the passage of a P wave through the rock?
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back and forth parallel to the direction of wave travel
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back and forth perpendicular to the direction of wave travel
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in a rolling circular motion
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the particles do not move
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Explanation:
Detailed explanation-1: -Particles of rock move forward and back during the passage of the P waves. Primary waves can travel through both fluids and solids.
Detailed explanation-2: -The answer is shear waves. Remind them that in shear waves particles of material move back and forth perpendicular to the direction in which the wave itself moves. S-waves (S stands for secondary) are shear earthquake waves that pass through the interior of the Earth.
Detailed explanation-3: -There are two types of seismic waves, primary waves and secondary waves. Primary waves, also known as P waves or pressure waves, are longitudinal compression waves similar to the motion of a slinky (SF Fig. 7.1 A).
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