Question

Which part of Earth's interior is believed to consist mostly of iron and nickel?

A. inner core
B. outer core
C. mantle
D. crust

Answer 1

B. outer core

The outer core is molten liquid and is 2000 km thick. It is made of iron and nickel and it causes Earth's magnetic feilds.

Answer 2

inner core

crust is the ground
mantle is the second layer
out core is the third layer
inner core is the central