The outer core and the inner core, I think. Try watching the movie "The Core".
outer core
Earth's core creates the magnetosphere.
The Core
outer core
it is the outer core because it was on study island
The Liquid Outer Core.
The liquid portion of the barysphere, ie, the outer core.
The Liquid Outer Core.
outer core
The Liquid Outer Core.
The Liquid Outer Core.
The snow creates a thick layer in which traps the heat inside the earth.