Core
Explanation
The Earth's interior is chemically differentiated into concentric layers based on the density and composition of materials. This chemical classification, famously associated with Edward Suess, divides the Earth into Sial, Sima, and Nife.Detailed Analysis:
- Core (Nife): The innermost layer of the Earth is composed primarily of heavy metals having high density. The dominant elements are Nickel (Ni) and Iron (Fe) (Ferrous). Consequently, this layer is referred to by the acronym 'Nife'.
- Crust (Sial and Sima):
- The upper continental crust is rich in Silica (Si) and Aluminium (Al), known as 'Sial'.
- The oceanic crust is dominated by Silica (Si) and Magnesium (Ma), known as 'Sima'.
- Mantle: Located between the crust and the core, the mantle is composed of silicate rocks rich in iron and magnesium but is not referred to as 'Nife'.
- Lithosphere: This is the mechanical outer layer of the Earth, comprising the crust and the rigid uppermost mantle. It is defined by its physical rigidity rather than the specific chemical composition 'Nife'.
Key Takeaway: The term 'Nife' is derived from the chemical symbols Ni (Nickel) and Fe (Ferrous/Iron), representing the metallic composition of the Earth's Core.