GEOLOGY

Detailed explanation-1: -Earth’s core is the very hot, very dense center of our planet. The ball-shaped core lies beneath the cool, brittle crust and the mostly-solid mantle. The core is found about 2, 900 kilometers (1, 802 miles) below Earth’s surface, and has a radius of about 3, 485 kilometers (2, 165 miles).

Detailed explanation-2: -Earth’s inner core is the innermost geologic layer of planet Earth. It is primarily a solid ball with a radius of about 1, 220 km (760 mi), which is about 20% of Earth’s radius or 70% of the Moon’s radius.

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 central part of the earth which is in solid state is inner core. The Earth has an outer solid layer called the crust, a highly viscous layer called the mantle, a liquid layer that is the outer part of the core, called the outer core, and a solid centre called the inner core.