Geology and Earth Resources By: Michela Griffin. Earth as a Layered Sphere Core: Interior of the earth; composed of a dense, intensely hot mass of metal.
Rock Types Igneous, Sedimentary, Metamorphic Igneous rocks make up 95% of the rocks of the crust of Earth. They are also some of the oldest rocks that.
EARTH SYSTEMS. EARTH’S LAYERS Core: nickel.
