potassium
inner core
We are not sure whether the core of the earth is solid or not, therefor the innermost layer must be either the core, or the layer next to the core.
The deepest layer of the Earth is the inner core, which is a solid sphere made mostly of iron and nickel. It is believed to have a radius of about 1,220 kilometers (760 miles) and is surrounded by the outer core, mantle, and crust.
the inner core
The inner core.
How the Earth Was Made - 2009 The Deepest Place on Earth 1-2 was released on: USA: 17 February 2009
Scientists believe that the Earth's inner core is most likely made of solid metals, primarily iron and nickel. This is supported by seismic wave data and studies on the Earth's magnetic field.
The deepest layer of the lithosphere is called the asthenosphere. It is located just below the lithosphere and is made up of partially molten rock that allows the lithosphere to move and float on top of it. The asthenosphere plays a crucial role in plate tectonics and the movement of Earth's crustal plates.
the inner core
upper layer is made of mantle of the earth.
regolith, outer layer of the earth is made of rock and soil.
upper layer is made of mantle of the earth.