what is the outermost layer of the earth

The outermost layer of the Earth is called the crust. It is a solid rock layer that ranges in thickness from 0 to 60 kilometers (0 to 37 miles). The crust is the thinnest of the Earths layers and rests on top of the mantle. It is the layer where all known life in the universe exists. The Earth's crust is divided into two varieties: the continental crust, which is thicker and less dense, and the oceanic crust, which is thinner and more dense.