GEOLOGY

Detailed explanation-1: -The Core is predominantly composed of iron and nickel. Even after 4.5 billion years of cooling, the Earth’s core remains very hot. The Earth’s core is divided into two layers, a solid inner core, and a liquid outer core . The Inner Core (D) (1216 km) is solid nickle-iron alloy.

Detailed explanation-2: -Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal-specifically, iron and nickel.

Detailed explanation-3: -5 In the center of Earth is the core, consisting of two layers: the inner and outer core. The entire iron and nickel core is extremely hot, so it is not surprising to learn that the outer core is in a molten state. However, the inner core’s iron and nickel are solid.

Detailed explanation-4: -The inner core is believed to be composed of an iron–nickel alloy with some other elements. The temperature at the inner core’s surface is estimated to be approximately 5, 700 K (5, 430 °C; 9, 800 °F), which is about the temperature at the surface of the Sun.

Detailed explanation-5: -The layers of the Earth that can be considered solid are: lithosphere (the earth’s crust and the upper part of the upper mantle), the mesosphere and inner core.