1. Interior of the earth
   1. Crust - SIAL
      1. Continental Mass -35KM
      2. Oceanic mass- 5 km
   2. Mantle - SIMA
      1. 2900 below crust
   3. Core - NIFE
      1. radius - 3500 km
2. Rocks and minerals
   1. igneous rocks
      1. intrusive
      2. extrusive
   2. sedimentary rocks
   3. metamorphic rocks