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Answers
It is the innermost layer i.e. it is below the mantle. Its radius is about 3500 km. The core consists of outer core and inner core. It is mainly made up of:
Nickel
Iron
The innermost layer is also called ‘nife’. The name nife is derived from the word ‘ni’ from nickel and ‘fe’ from ferrous meaning iron. The temperature and pressure of the central core is very high.
Answer:
1)The name nife is derived from the word 'ni' from nickel and 'fe' from ferrous meaning iron.And we can find nickel and iron in core due to the high temperature.
2)Rocks whose constituents are newly formed particles that have never been constituents of previously formed rocks and that are not the products of alteration or replacement, such as limestones formed by precipitation from solution.for ex: Igneous rocks