In contrast to the outer solid mantle, parts of the central regions of Earth's interior are thought to be fluid because
A)P seismic waves cannot make it through those regions.
B)S seismic waves cannot make it through those regions.
C)neither P nor S seismic waves can make it through those regions.
D)both P and S seismic waves easily make it through those regions.

Question

Quizplus · Accepted Answer

S seismic waves, or shear waves, cannot travel through fluids, which indicates that parts of Earth's interior, like the outer core, are in a fluid state. P waves, or primary waves, can travel through both solids and liquids, but their speed changes, providing clues about the state of the material they travel through.

In Contrast to the Outer Solid Mantle, Parts of the Central