Match the layer of the earth with its best description. 1.inner core 1 made of solid iron 2.outer core layer just outside of the outer core 3.lower mantle plastic portion of the upper mantle of the earth 4.upper mantle very dense liquid of iron and sulfur 5.crust thin, rigid surface of Earth 6.lithosphere layer that includes the asthenosphere 7.asthenosphere made of large plates that move