THE EARTH'S INNER CORE
The Inner core of the earth is in the center which is protected by the outer core and then the mantle and the crust.And it is the hottest part in the Earth And the Inner core is so hot that it can have almost the same heat as the sun. But it can also cool off. Some Scientests think that the crust is made of pure iron . the inner core is solid rock its really hot its a type of metamorphic rock and its mostly scalding hot magma. Its 1,220 km (760miles) thats half of the moons size. also a giant astroid came before the earth was formed and it just went to the center and created the inner core.