1. Why does the Earth have different layers?

2. List the layers of the Earth and provide a short description of each layer (in complete sentences) starting with the center of the Earth.

3. How is density related to the layers of the Earth?

Please select me as a Brainliest Answer please I just getting used to this, and that picture is me.

1. During the next major phase of earth's formation cooling and differentiation of the Earth's layers occurred. Dense materials sank to the center, forming an iron-nickel rich core. Lighter buoyant silicate-rich magma rose to the surface.

2.  the Earth has four layers-  the solid crust on the outside, the mantle and the core -split between the outer core and the inner core. the Earth has four layers: the solid crust on the outside, the mantle and the core, split between the outer core and the inner core.

3. The atmosphere and Earth's interior are layered by density. Earth's core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer. Earth's liquid metal outer core has convection, which generates the magnetic field.

Explanation:

i believe the answer is a.

it is a solid

explanation: