Question

Earth has ______ major concentric zones of material.

Answer 1

3

Step-by-step explanation:

As the earth cooled, density differences between the forming minerals caused the interior to become differentiated into three concentric zones: the crust, mantle and core.

Answer 2

3

Step-by-step explanation:

crust (oceanic & continental crust), mantle (thickest layer), core

Side note:

Lithosphere is the crust and upper mantle