Question

The inner core is about 1,200 km thick. Because of the pressure in the inner core, the core cannot move like a liquid and are solid. The inner core may have a temperature up to about 13,000°F (7,200°C), which is hotter than the surface of the Sun. What is the inner core composed of?

Metals (mostly Iron and some Nickel)

Rock

Iron, Magnesium, Aluminum, Silicon, and Oxygen Silicate Compounds

Plastic

Answer 1

The inner core is believed to be composed of an iron–nickel alloy with some other elements.