Question

3 which of the following is true about earths interior? a all of earths layers are made of the same materials b the deeper you descend, the thinner the layers become c the pressure from the crust, mantle, and outer core makes earths inner core solid

Explanation:

• Option A: Earth's layers (crust, mantle, outer core, inner core) have different compositions. For example, the crust has rocks like granite and basalt, while the core is mainly iron and nickel. So A is false.
• Option B: The crust is the thinnest layer. As you go deeper (from crust to mantle to core), the layers are not thinner. The mantle is much thicker than the crust. So B is false.
• Option C: The inner core is solid. The high - pressure environment from the overlying crust, mantle, and outer core (despite the high temperature) keeps the inner core in a solid state. So C is true.

Answer:

C. The pressure from the crust, mantle, and outer core makes Earth's inner core solid