Earth's Internal Structure - Crust Mantle Core. » Earth is made up of several different layers, each with unique properties. Structure of the earth’s interior. geography quiz questions and answers on topic of internal structure of earth geography for practice test, quiz and entrance exam questions freely available to download for pdf export » These layers can be defined by their chemical and their rheological properties. » The interior structure of the Earth is layered in spherical shells, like an onion. Structure of earth’s interior is fundamentally divided into three layers – crust, mantle and core. The inner structure of the Earth is described by the authors on the basis of systematic processing and evaluation of the traditional and newer theories and conceptions.