How is the Earth divided into layers based on mechanical properties?

Mechanically, the Earth is divided into the following layers:

  • Lithosphere: The rigid outer layer that includes the crust and the upper part of the mantle. It is broken into tectonic plates.
  • Asthenosphere: A semi-fluid layer beneath the lithosphere that allows the tectonic plates to move.
  • Mesosphere: The more rigid part of the mantle, located beneath the asthenosphere.
  • Outer Core: A liquid layer composed mainly of iron and nickel, responsible for generating Earth’s magnetic field.
  • Inner Core: The solid innermost layer, composed primarily of iron and nickel.