GEOLOGY

Detailed explanation-1: -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-2: -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-3: -It is widely accepted that the Earth’s inner core formed about a billion years ago when a solid, super-hot iron nugget spontaneously began to crystallize inside a 4, 200-mile-wide ball of liquid metal at the planet’s center.

Detailed explanation-4: -Layer 1. The inner core is a solid metal made up of nickel and iron. Layer 2. The outer core is a liquid molten (liquid) rock.