Here's a more detailed breakdown:

* Above the outer core: The mantle, a thick layer of mostly solid rock.

* Below the outer core: The inner core, a solid ball of iron and nickel.

Think of it like an onion with layers:

1. Crust: The outermost, thin, rocky layer.

2. Mantle: The thickest layer, mostly solid rock.

3. Outer Core: A liquid layer of iron and nickel.

4. Inner Core: A solid ball of iron and nickel.