11 The composition of Earth from its surface to its center 6,300 kilometers (km) down can be studied using seismic waves.
There are two basic types of seismic waves. S-waves and P-waves. Students studying Earth's interior are given the
following information about P and Swaves and how they travel through Earth.
• S-waves travel only through solids.
• P-waves at 30km depth change direction
• P-waves can travel through solids and liquids.
. S-waves and P-waves are detected from 5.200 km to 6.300 km deep
• P-waves, but no S-waves, are detected from 2.900 km to 5.200 km deep
• S-waves and P-waves are detected from the surface (0 km) to 2.900 km deep.
Select the four statements that can be concluded from the information
A There is a boundary between solid and liquid layers at 30 km.
B There is a change in density occurring at 30 km.
There is density change that occurs at 2,900 km and 5.200 km.
D The densest material is found from 2.900 km to 5,200 km.
E There is a liquid layer from 2.900 km to 5.200 km.
F The densest material is found from 5,200 km to 6,300 km.