What can we conclude about the structure of Earth's interior knowing that the average density of Earth is higher than the average density of the rock on the continents and seafloor?

Question

Quizplus · Accepted Answer

The fact that Earth's average density is higher than that of the rock on the continents and seafloor suggests that there must be denser materials beneath the surface, such as iron in the core. Therefore, choice C, "That Earth's most dense material must be beneath the surface" is the most reasonable conclusion based on this information. Choices A and B are incorrect because water and the seafloor/continents, respectively, have lower densities than the average density of Earth. Choices D and E are also incorrect because they suggest that the least dense material is either the seafloor/continents or beneath the surface, respectively, but this is not necessarily true based on the given information.

What Can We Conclude About the Structure of Earth's Interior