How do seismologists know the outer core is liquid?
A)P-waves are refracted upon arrival in the outer core
B)S-waves are absorbed upon arrival in the outer core
C)both S-waves and P-waves speed up in the outer core
D)both S-waves and P-waves slow down in the outer core

Question

Quizplus · Accepted Answer

S-waves cannot travel through liquids, so their absence in the outer core indicates it is liquid.

How Do Seismologists Know the Outer Core Is Liquid