Death by Core

death by fire or ice? Looks like ice!

The Actual Freezing of Earth's Core

The inner core is the innermost part of Earth's whole core, and it's about the size of the moon. As the Earth cools from the inside out, the molten outer core is slowly freezing. This is leading the solid inner core to grow at a rate of approximately 1 millimeter per year.

The Core

This is a picture of what the core of the Earth looks like. It has multiple layers. The core is filled with magma, made from liquid iron and liquid nickel.

The Earth

The inner core of the Earth is simultaneously melting and freezing due to circulation of heat in the overlying rocky mantle. Like a pan of water boiling on a stove, convection currents move warm mantle to the surface and send cool mantle back to the core.

Mars

Mars is the same way as the moon. The core froze and the whole planet turned into a barren rock.

The Moon

This is a picture of the Moon. The Moon's core froze and this is what the surface turned into and what the Earth might do if/when the core freezes. The moon is basically a big rock.
Documentary National Geographic - Journey to the center of the Earth