# From the earth’s surface till the deep inside, in how many parts has the earth been divided?

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From the earth’s surface till the deep inside, in how many parts has the earth been divided? Write each in brief.

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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).