Question

analyzing the properties of rocks in earths layers
layer | density (g/cm³)
| top | bottom
crust | 2.2 | 2.9
upper mantle | 3.4 | 4.4
lower mantle | 4.4 | 5.6
you have learned that different types of rocks are found in earths layers. their composition affects their densities.
what can you conclude based on the information in the table?
○ the rocks in the crust are the most dense.
○ the rocks in the upper mantle are the most dense.
○ the rocks in the lower mantle are the most dense.
○ the rocks in the core are the most dense.

Explanation:

To determine the most dense rocks, we compare the maximum density values of each layer:

• Crust: max density is 2.9 g/cm³.
• Upper mantle: max density is 4.4 g/cm³.
• Lower mantle: max density is 5.6 g/cm³.
• Core: No data in the table, so we can't consider it from the given info.

Among the layers with data, the lower mantle has the highest max density (5.6 g/cm³).

Answer:

The rocks in the lower mantle are the most dense.