what is the center of the earth made out of

Question: what is the center of the earth made out of
- Keywords:
  centre of the earth,
  earth
Asked by cr4b7 to Cathal, Daphne, Darren, Jon, Katherine on 15 Mar 2012.
- Darren Logan answered on 15 Mar 2012:
  
  The inner core of earth is a hot but solid sphere, made mainly of iron, with some nickel. Surrounding the inner core is an outer core that is molten but largely made up of the same elements.

Question: what is the center of the earth made out of