SOLAR SYSTEM

Detailed explanation-1: -The lower mantle refers to the layer between the outer core and asthenosphere. It makes up 55% of Earth by volume and experiences pressure from 237, 000 atm to 1.3 million atm towards the outer core. Heat and pressure in the lower mantle are much greater than in the upper mantle.

Detailed explanation-2: -Mesosphere: the strong, lower part of the mantle between the asthenosphere and the outer core 7. Tectonic Plate: a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle.

Detailed explanation-3: -The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth’s structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below.

Detailed explanation-4: -Between the upper mantle and the core lies the lower mantle. Beneath the lower mantle, the core makes up the Earth’s center and contains mostly iron and nickel. Its outermost layer is liquid, but its innermost layer is solid due to incredible pressure.