GEOLOGY

Detailed explanation-1: -Outer Core The outer core, about 2, 200 kilometers (1, 367 miles) thick, is mostly composed of liquid iron and nickel. The NiFe alloy of the outer core is very hot, between 4, 500° and 5, 500° Celsius (8, 132° and 9, 932° Fahrenheit).

Detailed explanation-2: -The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. The outer core is responsible for Earth’s magnetic field. As Earth spins on its axis, the iron inside the liquid outer core moves around.

Detailed explanation-3: -It is well known that iron is the most abundant element in the Earth’s core, which contains  85.5 wt % iron, with the rest  14.5 wt % accounted for by nickel and some lighter elements.

Detailed explanation-4: -Earth’s interior is layered like an onion. The solid iron-nickel inner core-today 1, 200 kilometers (745 miles) in radius, or about three-quarters the size of the moon-is surrounded by a fluid outer core of molten iron and nickel about 2, 400 kilometers (1, 500 miles) thick.

Detailed explanation-5: -The earth’s core is divided into two separate regions: the liquid outer core and the solid inner core, with the transition between the two lying at a depth of 5, 156 kilometers (3, 204 miles).