Because S-waves do not travel through Earth's outer core, scientists inferred that the outer core is
A) impenetrable.
B) molten liquid.
C) solid.
D) very dense.
Question 2
P-waves travel faster through the inner core than the outer core because the inner core is
A) hotter than the outer core.
B) the same as the outer core.
C) rock.
D) solid.