Question

If we separate Earth's layers based on mechanical properties, how many are there? What are they? How do their properties differ? ​

Answer 1

Answer:

There would be 2 layers: lithosphere and asthenosphere

Explanation:

They contradict each other because the lithosphere consists of the crust as well as the portion of the upper mantle, which acts as a brittle, rigid solid. the asthenosphere is a partially molten upper mantle material that acts plastically and can flow.

Or you can think of it as:

The lithosphere is the brittle crust and uppermost mantle. The asthenosphere is a solid but it can flow, like toothpaste. The lithosphere rests on the asthenosphere.