Select the correct answer from the list.(2 points)

Question

Earthquake scientists use
waves to study the characteristics of Earth's layers. Some earthquake waves cannot travel through a liquid, such as
. Scientists believe the
must be liquid.

Answer 1

Select the correct answer from the list.(2 points)
Earthquake scientists use
seismic waves to study the characteristics of Earth's layers. Some earthquake waves cannot travel through a liquid, such as
P waves. Scientists believe the
outer core must be liquid.