Because the outercore applies pressure to the innercore. Its like the book stack effect, pile up 5 books. Which book has the most pressure on it? The bottom. Now imagine that being a CIRCLE of books, the INNERbook or the innercore would have the most pressure.
earths innercore. it's temperature is so hot because of all the pressure from the other layers of the earth. the techtonic plates moving have nothing to do with the innercore.
Solid
I know it is nickel
crust mantle outtercore innercore
hot burning rock and magma
lithosphere asthenospere mesosphere outercore innercore
Around 5,400 degrees Celsius to 6,000 degrees Celsius.
inner core
Heavy (or dense) ones ...mostly iron.
crust athenisphere mantle outer core innercore
There is first the mantle then crust then the innercore and then the outtercore
The size of the earth's inner core is about 15 percent of the earth's mass.