the earth's core
The Earth's core is the part of Earth in the middle of our planet. It has a solid inner core and a liquid outer core. Outer core. The outer core of the Earth is a liquid layer about 2,260 kilometers thick. It is made of iron and nickel. This is above the Earth's solid inner core and below the mantle. Its outer boundary is 2,890 km (1,800 mi) beneath the Earth's surface. The transition between the inner core and outer core is approximately 5,000 km (3,100 mi) beneath the Earth's surface. The temperature of the outer core ranges from 4400 Â°C in the outer regions to 6100 Â°C near the inner core.