The Formation and Structure of the Earth
I. Formation of the Earth
II. Layers of the Earth
    A. The Inner and Outer Cores
        1. Composition
        2. Discovery
    B. The Mantle
        1. Composition
    C. The Crust
        1. Mohorovicic Discontinuity
        2. Composition
        3. Continents and Oceans
        4. Cratons / Continental Shields
III. The Lithosphere
    A. Definition
    B. Asthenosphere
    C. Plates