UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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composed of iron and nickel
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more dense than the inner core
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hotter than the rock’s melting point
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in the solid state of matter
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Detailed explanation-1: -Shear waves cannot travel in liquids or gases–so, for example, S waves don’t travel through the ocean or through the outer core.
Detailed explanation-2: -P waves can travel through both solid and liquid phases, whereas S waves can only travel through solid phases. Since the solid inner core is surrounded by a liquid outer core, the S waves will never reach the former.
Detailed explanation-3: -The S-wave shadow zone occurs because S-waves cannot travel through the liquid outer core. The P-wave shadow zone occurs because seismic velocities are much lower in the liquid outer core than in the overlying mantle, and the P-waves are refracted in a way that leaves a gap.
Detailed explanation-4: -Answer and Explanation: No, seismic surface waves do not travel through the mantle of the Earth. Seismic surface waves, such as Rayleigh waves and Love waves, only travel in the upper layers of rock in the crust of the Earth. In most circumstances, they only penetrate a few meters below the surface.