Question

Why is there difference between the core and outer core?

Answer 1

Inner Core

Innermost layer of Earth

Solid ball of iron and nickel

Has a radius of 1,220 kilometers or 768 miles

Temperature estimated to be about 5,400 degrees Celsius or 9,800 degrees Fahrenheit

Outer Core

Surrounds the inner core

Made of liquid iron and nickel

Approximately 2,300 kilometers or 1,400 miles thick

Hottest region is about 3,730-7,730 degrees Celsius or 6,740-13,940 degrees Fahrenheit