Following is the Earth's layers diagram showing the important interior layers of the planet earth. The interior of the Earth shows several important layers, like Continental Crust (SIAL), Oceanic Crust (SIMA), UpperMost Mantle, Partially Molten Asthenosphere, Solid Asthenosphere, Mantle Transition, Lower Mantle, Outer Molten Core, and Inner Solid Core. At close to 3,000 kilometers (1,865 miles) thick, Mantle is Earth's thickest layer. It starts a mere 30 kilometers (18.6 miles) beneath the surface and is mostly iron, magnesium, and silicon. The Earth Layers diagram shows that the Mantel is dense, hot, and semi-solid. Creating such science diagrams is very easy with EdrawMax, as you can find several important symbols that help you create such intrinsic designs.