Chapter+10

__ EARTH LAYERS __



__CRUST__ The outer solid shell of eart. The crust is compose of two parts. contineental, It is compose of igneous, metaporphic and sediment rocks. ocean, it is composed of besalt, diabese and gabro. It is 3 to 6 miles thick. __MANTLE__ The mantle is divide in three parts. Upper Mantle, 7-35 km, the transition zone, 410-660 km, lower mantle 660- 2891 km. It makes up a bigger percentage of earth. The mantle is not made up of 100%