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

Question

Earthquake scientists use 1)___ waves to study the characteristics of Earth's layers. Some earthquake waves cannot travel through a liquid, such as 2)___. Scientists believe the 3)___ must be liquid.
responses
1)
seismic
x-rays
2)
s-waves
p-waves
3)
inner core
outer core

Answer 1

1. seismic
2. s-waves
3. outer core

So the complete sentences would read: Earthquake scientists use seismic waves to study the characteristics of Earth's layers. Some earthquake waves cannot travel through a liquid, such as s-waves. Scientists believe the outer core must be liquid.