GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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P waves
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S waves
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Both P and S waves
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Neither P nor S waves
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Detailed explanation-1: -In a P wave, the rock particles are alternately squished together and pulled apart (called compressions and dilatations), so P waves are also called compressional waves . These waves can travel through solids, liquids, and gases.
Detailed explanation-2: -P-wave and S-wave paths through the earth. Scientists discovered that Earth’s outer core is liquid by observing seismic waves. P waves travel through solid and liquid, but S waves do not travel through liquid.
Detailed explanation-3: -There are two types of body waves: P-waves travel fastest and through solids, liquids, and gases; S-waves only travel through solids.
Detailed explanation-4: -P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.