Passage VI
Earth's interior is divided into 4 primary layers of different chemical composition: the crust, mantle, outer core, and inner core. Figure 1 shows the 4 layers, their depths, and 2 named layer boundaries (Moho and Gutenberg Discontinuity). The lithosphere, asthenosphere, and transition zone boundaries were determined using speed changes in S waves, a type of earthquake wave. Speed changes indicate a phase and/or density change of material inside Earth.
Figure 2 shows how P-wave (another earthquake wave type) and S-wave velocities and density change with depth inside Earth.
Figure 3 shows how Earth's temperature changes with depth.
32. An increase in pressure increases the density of materials. Using this information and the data provided, which of the following would one infer about Earth's interior?
Your Answer is
Correct Answer is H
Explanation
Look at figure 2, the place with the greatest density is in the inner core, indicating that the pressure here is the largest