My core consists of nickel and iron, and has a temperature of 5000 degrees Celsius. Amazingly it is the hottest layer inside of me.
I also have a mantel that has hot molten rock that is constantly rising to my surface and then sinking back down closer to my core. My outermost layer, the crust, is amazingly made of separate plates that connect together like a jigsaw puzzle. The plates of the crust are overlapping, crashing and slipping sideways all the time.
Who am I?