dewey decimal redirects here it is not to be confused with duodecimal the dewey decimal classification ddc or dewey decimal system is a proprietary library classification system first published in the united states by melvil dewey in 1876
physical geography The scientific study of the natural features of the Earth's surface, especially in its current aspects, including land formation, climate, currents, and distribution of flora and fauna. Also called physiography.
The Physical Structure of Earth Figure 2 shows how Earth is divided into five layers based on physical properties. Earthâs outer layer is the lithosphere, which is a cool, rigid layer that includes the crust and the upper part of the mantle.