Earth is a round planet made up of layers. The inner core, an outer core, the lower mantle, the upper mantle, and the outer solid crust. The earth is 61 degrees F (16 C). The earth is made up of iron and nickel. In fact, the earth is made up of oxygen (46%), silicon (27.7%), aluminum (8.1%), iron (5%), and calcium (3.6%). Composition of the Earth.
