The outer core is liquid iron and nickel and generates the Earth's magnetic field. And the inner core is made of solid iron and nickel. The surface of the earth is constantly changing. It's the ...

Inside the belly of planet Earth, a giant solid ball of metal is surrounded by a swooshing layer of liquid iron and nickel, ...

The iron isn't pure—scientists believe it contains sulfur and nickel, plus smaller amounts ... Above the inner core is the outer core, a shell of liquid iron. This layer is cooler but still ...

In layman language, the inner core is a solid sphere made up of primarily iron and nickel, surrounded by the liquid iron-nickel outer core. Approximately the size of the moon, it is located over ...