What is the difference between compositional layers and mechanical layers of the earth?
Compositional layers refer to the different layers of the Earth based on their chemical composition, such as the crust, mantle, and core. Mechanical layers, on the other hand, are based on the physical properties and how they behave under stress, like the lithosphere, asthenosphere, and mesosphere. The crust, mantle, and core are compositional layers, while the lithosphere, asthenosphere, and mesosphere are mechanical layers.