The thickness of each layer depends on the rock mass.
Explanation:
Earth is divided into four layers as the crust, mantle, core, and inner core. The thickness of each layer varies with the depth and nature of rocks. The crust is the topmost layer of the earth consists of a thickness of 5 to 70 km that is land and water sphere.
The mantle consists of a layer of thickness of 2,900 km and the outer core has a thickness of 2,200 km while that of the inner core is about 1,530 km thick.
