GEOLOGY

Detailed explanation-1: -The core is made of two layers: the outer core, which borders the mantle, and the inner core. The boundary separating these regions is called the Bullen discontinuity. Outer Core The outer core, about 2, 200 kilometers (1, 367 miles) thick, is mostly composed of liquid iron and nickel.

Detailed explanation-2: -Above the inner core is the outer core, a shell of liquid iron, this layer is cooler but still very hot, anywhere from 7, 200 to 9, 000 degrees Fahrenheit. (composed mostly of iron.) The next layer is mantle, many people think it’s lava, but it’s actually rock. The crust is the outermost layer of the Earth.

Detailed explanation-3: -The inner core is solid iron, and that’s surrounding by a molten core, theory holds. Around the core is the mantle, and near the planet’s surface is a thin crust-the part that breaks now and then and creates earthquakes.