GEOLOGY

Detailed explanation-1: -The molten layer is located about 100 miles from the surface and is part of the asthenosphere, which sits under the Earth’s tectonic plates in the upper mantle. The asthenosphere is important for plate tectonics because it forms a relatively soft boundary that lets tectonic plates move through the mantle.

Detailed explanation-2: -asthenosphere (convecting mantle) – the soft layer of the mantle on which the lithosphere floats.

Detailed explanation-3: -The plates move on a hot flowing mantle layer called the asthenosphere, which is several hundred kilometers thick. Heat within the asthenosphere creates convection currents (similar to the currents that can be seen in the lava lamp).

Detailed explanation-4: -Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.

Detailed explanation-5: -The asthenosphere is a “soft” layer beneath the hard lithosphere, and, as the name suggests, it is weak.