Here's a breakdown:
* Lithosphere: The rigid outermost layer of the Earth, composed of the crust and the uppermost part of the mantle.
* Asthenosphere: A soft, partially molten layer within the upper mantle. It's known for its plasticity, allowing tectonic plates to move.
* Upper Mantle: The region above the asthenosphere and below the lithosphere. It's mostly solid but behaves like a very viscous fluid over geological time.
* Lower Mantle: The region below the upper mantle and above the outer core.
* Outer Core: A liquid layer composed mostly of iron and nickel.
* Inner Core: A solid ball of iron and nickel at the Earth's center.
Therefore, the solid layer between the inner mantle and the lithosphere is the upper mantle.
