Question

Compare the interior layers of the earth according to physical properties​

Answer 1

Answer:

The Core

At the centre is the densest of the three layers, the core. It is mostly metallic iron with small amounts of nickel and other elements. The outer boundary of core is at a depth of 2,900 kilometres.

The Mantle

The thick shell of the dense, rocky matter that surrounds the core is called the mantle. The mantle consists of iron-magnesium-silicates and it is less dense than the core but denser than the outermost compositional layer, which also consists of rocky matter. The outer boundary of the mantle is at a depth from 8-70 km.

The Crust

The outermost compositional unit is the crust. While the core and the mantle have nearly constant thicknesses, the thickness of the crust is different in different places. The crust beneath the oceans, which is called oceanic crust, has an average thickness of about 8 km