Question

This is the geological theory where the cooler surface of the earth move slowly over the hotter layer underneath.

Answer 1

Plate Tectonics

Step-by-step explanation:

Plate Tectonics is the theory of global tectonics (geological structural deformations) that has become a paradigm in modern geology for understanding the structure, history and dynamics of the earth's crust.

The theory is based on the observation that this solid layer is divided into approximately 20 semi-rigid plates. The boundaries between these plates are zones with tectonic activity, where more earthquakes and volcanic eruptions occur.

Answer 2

Plate tectonics is the theory explaining that the Earth's crust is divided into numerous plates which is the cooler surface of the earth and many more related phenomena as a result from gliding over the rigid and hard shell which is the mantle, the hotter layer underneath the crust.