Which is the correct order of Earth's layers from the surface toward the center?

• A. Mantle, Crust, Outer Core, Inner Core
• B. Crust, Mantle, Outer Core, Inner Core
• C. Crust, Outer Core, Mantle, Inner Core
• D. Crust, Mantle, Inner Core, Outer Core

Answer: (B)

From the surface toward the center, the sequence is crust first, then mantle, then outer core, and finally inner core. The crust is the thin outer shell we live on, sitting above a much thicker mantle. The outer core lies beneath the mantle as a liquid layer of iron-nickel, and below that is the solid inner core at the center. This arrangement matches how seismic waves travel and how Earth’s magnetic field is generated in the liquid outer core. So the correct order is crust, mantle, outer core, inner core.