The mantle doesn't have just one "second name," but different parts of it have specific names.
The Earth's mantle is a thick layer of silicate rock between the crust and the outer core. It is divided into different layers with distinct properties. Because of this layered structure, different parts of the mantle have different names. The uppermost part of the mantle, combined with the crust, forms the lithosphere. Below the lithosphere is the asthenosphere, and further down is the mesosphere (also sometimes called the lower mantle).
Here's a breakdown:
- Lithosphere: This is not part of the mantle, but the upper rigid mantle plus the crust above it.
- Asthenosphere: The upper, more ductile (easily deformed) part of the mantle that lies below the lithosphere.
- Mesosphere (Lower Mantle): The stronger, more rigid lower part of the mantle beneath the asthenosphere.
Therefore, depending on which part of the mantle you are referring to, a possible "second name" could be either asthenosphere or mesosphere.
