1. Earth’s surface: It is the upper most part of earth. It is called Sial. It has mainly Silicon (Si) and Aluminium (Al).
2. Mantle: It is the middle part of earth called Sima. Its main components are Silicon (Si) and Magnesium (Mg).
3. Central part/Core: It is the deep inside of earth called Nife. It has more of Nickle (Ni) and Iron (Ferrous Fe).