Which lists the main layers of earth in order from outermost to innermost?

The main layers of the Earth, listed from outermost to innermost, are the crust, the mantle, the outer core, and the inner core. The crust is the thin, solid outer layer, while the mantle is a semi-solid layer beneath it. The outer core is liquid and composed mainly of iron and nickel, and the inner core is solid and also primarily made of iron and nickel.