Discuss seismic-wave shadow zones and what they indicate about Earth’s interior.
Seismic waves from an earthquake travel through the entire world. However, there are specific areas on the opposite side of the world from an earthquake that do not receive these seismic waves. These areas are known as seismic-wave shadow zones.
The size and pattern of these seismic-wave shadow zones for P-waves and S-waves have shown that the outer part of the core must be liquid, or behave like a liquid (because no S-waves are able to pass through at all), but the inner core must be solid (because the P-waves, which are able to pass through the liquid outer core, are bent in such a way that indicate an inner solid core. Seismic reflection)