Earth is composed of various layers like the crust, mantle, and core and all these layers are subdivided into various zones and in between these zones there exists solids, semi-solids, and liquids arranged in a various layer of spherical shells they have various discontinuous zones.
Based on composition and crust is a solid and utmost and thinnest layer of the planet, covering an average of 25 miles in thickness. It's composed of sedimentary, igneous and metamorphic rocks.
Mantel being composed of molten rocks, with outer, inner and transition zone of Mohorovicic discontinuity.
The core consist of outer inner, the outer is in the form of a liquid with 7,200 and 9,000 degrees and inner is a solid core with heavy metals and 13,000 degrees temperature. The Gutenberg discontinuity marks the zone of the upper core and mantel.
