* A solid inner core: primarily made up of iron (Fe) with a small percentage of nickel (Ni). The intense pressure at the center of the Earth, estimated to be over 3.5 million times atmospheric pressure, forces the iron into a solid state despite its extremely high temperature (around 5,200°C or 9,392°F).

* A liquid outer core: also primarily made of iron and nickel, but in a liquid state. The pressure is lower than the inner core, allowing the metal to flow. The movement of this liquid metal generates the Earth's magnetic field.

Other elements present in the core, though in smaller amounts, include:

* Sulfur (S)

* Silicon (Si)

* Oxygen (O)

The exact composition of the core is still being studied, but the primary components are well-established.