Question

warm up 10/6
which two layers are made mostly of iron and nickel?
a) crust and mantle
b) mantle and outer core
c) outer core and inner core
d) crust and inner core

Explanation:

The Earth's inner core and outer core are mainly composed of iron - nickel alloys. The crust is made of lighter elements like silicon, oxygen, aluminum etc., and the mantle is composed of silicate rocks.

Answer:

C. Outer Core and Inner Core