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The inner core.
The outer core of the Earth.
The inner core is solid and composed mostly of iron.
The core of the Earth is defined by two layers: the inner core which is solid, and the outer core which is liquid. Both are composed primarily of iron with nickel.
The inner core .
The Earth is composed of three layers. The lithosphere composes the crust or outer layer, the mantle the middle layer followed by the outer and inner core.
The hydrosphere is the layer of Earth composed of water.
Inner core
the outer core is the liquid layer of the earth's internal structure moving downwards fr the lower mantel while the inner core is solid layer of the earth's core composed of iron nickel alloys
The Inner core is the very center of Earth. It's 760 mi. in radius. It's composed of solid Iron and Nickel (i think), and has a temperature similar to the surface of the sun (5430 °C).
It is the innermost layer of the Earth. Also under the greatest pressure and the hottest. It is considered a solid and is composed primarily of iron. it is also the CENTER OF THE EARTH
The densest layer of the earth is the inner core.