What Happens Inside a Rock as a Wave Front from a P

question 6

Multiple Choice

What happens inside a rock as a wave front from a P wave passes through?

• A) The little parcel of rock shimmies from side to side as the wave passes, with the greatest motion at the Earth's surface, dying out with depth.
• B) The volume of the rock stays fixed, but it shears back and forth, distorting the rocks internal shape as the wave passes through.
• C) The rock moves toward and away from the earthquake as the volume of the material alternately expands and contracts, changing the rock's density while the compression- rarefaction wave passes through.
• D) The little parcel of rock rotates about its own location in an ellipse until the wave passes.

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