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 composed of the melted metals nickel and iron.

Detailed explanation-3: -The outer core is a liquid molten (liquid) rock. Layer 3. The mantle is dense and mostly solid rock.

Detailed explanation-4: -Although having a composition similar to Earth’s solid inner core, the outer core remains liquid as there is not enough pressure to keep it in a solid state.

Detailed explanation-5: -The inner core is a sphere of solid iron, while the outer core is made of molten iron thousands of kilometres thick.