Question

what is inside our? Define layers of earth in about( 150) words... ​

Answer 1

The Earth has four layers: the solid crust on the outside, the mantle and the core — split between the outer core and the inner core.

Answer 2

Explanation:

Interior of the Earth:

The earth is made up of several concentric layers with one inside another, just like an onion.

Crust:

• The uppermost layer on the earth’s surface is called the crust.

• It is the thinnest of all the layers.

• It is about 35 km, thick on the continental masses and only 5 km thick on the ocean floors.

• Main minerals constituent of the continental mass are silica and alumina.

• It is thus called sial (si – silica and al – alumina).
• The oceanic crust mainly consists of silica and magnesium.
• It is therefore called sima (si – silica and ma – magnesium)

    Mantle

• Just beneath the crust is the mantle.
• It extends up to a depth of 2900 km below the crust.

     Core

• The innermost layer is the core with a radius of about 3500 km.
• It is mainly made up of nickel and iron.
• Hence it is called nife (ni—nickel and fe—ferrous i.e., iron).
• The central core has very high temperature and pressure.

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