These are the crust, mantle, and core. However, there is a distinct inner and outer core and a less distinct inner and outer mantle. There is also different types of crust so there are as many as 7 or 8 layers in the Earth's crust.
The Outer Core. It Is Classified As A Liquid...Not A Solid (Like you think it would be;; That's what I got confused on) The evidence we have is that Scientists and those study people send waves down...