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The innermost layer of the earth is

The innermost layer of the earth is Correct Answer Core

The correct answer is Core.

Key Points

  • Earth Core:
    • The innermost layer of the earth is known as the core.
    • It is divided into the inner core and the outer core.
    • It comprises a high concentration of nickel and iron.
    • The outer core:
      • The outer core, surrounding the inner core, lies between 2900 km and 5100 km below the earth’s surface.
      • The outer core is composed of iron mixed with nickel (nife) and trace amounts of lighter elements.
    • The Inner Core:
      • The inner core extends from the center of the earth to 5100 km below the earth’s surface.
      • The inner core is generally believed to be composed primarily of iron (80%) and some nickel (nife).
      • Since this layer can transmit shear waves (transverse seismic waves), it is solid. (When P-waves strike the outer core inner core boundary, they give rise to S-waves)

Additional Information

  • The mantle is the widest section of the Earth. Its thickness is approximately 2,900 km.
    • The mantle is mainly made up of semi-molten rock known as magma.
    • The rock is hard in the upper part of the mantle, but lower down the rock is softer and begins to melt. 
    • The mantle is located directly under the Sima
  • The crust is the outer layer where we live.
    • The thickness is around 0-60 km.
    • It is a solid rock layer divided into two types:
      1. Continental crust covers the land
      2. Oceanic crust covers water
  • Sima is an antiquated blended term for the lower layer of Earth's crust. This layer is made of rocks rich in magnesium silicate minerals.

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