1. earth movements
   1. continental drift
      1. super continent pangea
      2. ocean tethys
      3. several smaller continents
      4. Alfred Wagner
      5. bases
         1. east coast of South America and west coast of Africa fit together
         2. tropical regions had polar conditions
         3. fossils in different continents same
         4. rock deposits and minerals same in continents
   2. sea floor movement
      1. sea floor movement away from ridges due to underwater magma
   3. plate tectonics
      1. mountains
         1. mountain
            1. fault mountains
            2. when two plates clash
            3. fold mountains
            4. inside the continent
            5. when floor between two places sink
            6. synclinal valleys
            7. horst-higher part
            8. graben-lower part
         2. mountain range
            1. many mountains
         3. mountain belt
            1. a collection of mountain ranges
      2. volcanoes
      3. earthquakes
2. structure
   1. core
      1. inner core
         1. depth-5100
         2. iron
      2. outer core
         1. depth-2900
         2. iron
         3. 10%sulphur
      3. 3000*C
   2. mantle
      1. lower mantle
         1. depth-670
         2. iron,magnesium,aliminium,silica,oxygen silicate
      2. upper mantle
         1. base of crust
         2. asthenosphere-100-200km
         3. iron,magnesium,aliminium,silica
      3. 83% of volume of earth
   3. crust
      1. oceanic crust
         1. SiMa
            1. 40% silica
            2. 40% magnesium
            3. 20% iron
         2. 5-10 km
      2. continental crust
         1. SiAl
            1. 40% silica
            2. 40% aliminium
            3. 20% iron
            4. granite rocks
         2. 50-70 km