Question

seismologists can determine the internal structure of the earth, including the fact that the outer core is liquid, by analyzing seismic waves. explain how the behavior of p-waves and s-waves provides this evidence.

Explanation:

P-waves (primary waves) are compressional and travel through solids, liquids, and gases. S-waves (secondary waves) are shear waves and cannot travel through liquids. When earthquakes occur, S-waves are not detected on the opposite side of Earth from the epicenter (a "shadow zone"), while P-waves are refracted when passing through the outer core. This absence of S-waves and refraction of P-waves indicate the outer core is liquid.

Answer:

S-waves cannot travel through liquids, so their absence in the shadow zone opposite an earthquake epicenter shows the outer core is liquid. P-waves are refracted when moving through the outer core, further confirming its liquid state.