GEOLOGY

Detailed explanation-1: -The inner core is at the center of the Earth because it is the densest, made of solid iron and nickel.

Detailed explanation-2: -Earth’s interior layers are ordered by density. The densest layer is the solid metal inner core, the mantle is of intermediate density, and the least dense layer is the lithosphere, particularly the continental lithosphere. The origin of these layers and how scientists know about them is fascinating.

Detailed explanation-3: -Earth density by core, mantle, and crust But if you compare Earth density by its layers, density steadily increases as you go inwards from the crust to core. INNER CORE: Earth’s inner core has the highest density at 12.9 g/cm3.

Detailed explanation-4: -At the center of the Earth lies the core, which is nearly twice as dense as the mantle because its composition is metallic (iron-nickel alloy) rather than stony.

Detailed explanation-5: -The solid inner core is situated about 3, 200 miles below the Earth’s crust and is separated from the semi-solid mantle by the liquid outer core, which allows the inner core to rotate at a different speed from the rotation of the Earth itself. With a radius of almost 2, 200 miles, Earth’s core is about the size of Mars.