Layers of the Earth

Do you know where the hottest place on Earth is? It's not the Sahara Desert, or on the face of the earth at all. To get there we must go through the four layers of the earth. The outermost layer is the crust. It is five to ten kilometers thick in the ocean basins. The mantle is the next layer. It is 2900 kilometers thick and is much hotter than the crust. It temperature gets up to 1000 degrees Celsius. Most of the earth's internal heat is located here. The second closest to the center of the earth is the outer core. It is filled with molten or liquid rock and iron. The earth's magnetic field is controlled by the liquid outer core. The temperatures here can get up to about 3700 degrees Celsius! That's hot! And it's also 5200 kilometers thick. The inner core is solid and is the center of the earth. It is almost completely composed of iron. It is also 4300 degrees celsius.