Earthquake scientists use(X-ray or seismic) waves to study the characteristics of Earth's layers. Some earthquake waves cannot travel through a liquid, such as (S-waves or P-waves) Scientists believe the (inner core or outer core) must be liquid.
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.
