Question

Multiple Choice Question
From least to most dense, what is the correct order of Earth's four major layers?
A.
crust, outer core, inner core, mantle

B.
inner core, outer core, mantle, crust

C.
crust, mantle, outer core, inner core

D.
mantle, inner core, outer core, and crust

Answer 1

C. crust, mantle, outer core, inner core

Explanation: Density generally increases with depth — the crust is least dense, the mantle is denser, the liquid outer core is denser still, and the solid inner core (iron–nickel) is the most dense.