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 is false: Earth's layers (crust, mantle, core) have distinct compositions (e.g., crust is silicate-rich, core is iron-nickel).
• Option B is false: Deeper layers like the mantle and core are much thicker than the thin crust.
• Option C is true: Extreme pressure from the overlying crust, mantle, and outer core compresses the inner core's iron-nickel material into a solid state, despite high temperatures.

Answer:

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