What would it be like to take a journey to the center of the earth?
Well, you’d travel through the Earth’s four concentric layers: inner core, outer core, mantle and crust.
The crust is the outer layer of the earth. It is a thin layer between 0-60 km thick. The crust is the solid rock layer upon which we live. It is made up of tectonic plates which are constantly in motion. Earthquakes and volcanoes are most likely to occur at plate boundaries, where they collide, slide by, or subvert.
The mantle is the widest section of the Earth. It has a thickness of approximately 2,900 km. It is made up of semi-molten rock called magma. In the upper parts of the mantle the rock is hard, but lower down the rock is soft, malleable and beginning to melt.
The outer core is the layer surrounding the inner core. It is a liquid layer made up of iron and nickel. It is extremely hot, with temperatures similar to the inner core.
The inner core is in the centre and is the hottest part of the Earth. It is solid and made up of iron and nickel with temperatures of up to 5,500°C. With its immense heat energy, the inner core is like the engine room of the Earth.
Click the infographic below to see a larger version and learn more…