MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Structure of the Earth. Cutaway artwork showing the internal structure of the Earth. At lower right is a diagram showing the relative sizes of the Earth and the Moon. At the centre of the Earth is the core (white), a solid ball of nickel and iron metal. Overlying that is the outer core (yellow), which comprises molten nickel and iron. Currents in this region generate the Earth's magnetic field. Overlying this layer is the mantle (orange), a thick layer of molten rock on which the plates of the crust float. The crust is a layer of solid rock that is between 10 and 70 kilometres thick.
Model release not required. Property release not required.