Geologists have found that the upper layers of the mantle are "plastic." Why is this important?
A) Plastic is an important resource for the future.
B) These layers can easily crack to allow pent-up heat and energy to escape.
C) These layers can easily bend to accommodate oceans and mountains.
D) The continents are able to float and drift on these layers.

Question

Quizplus · Accepted Answer

The upper mantle's plasticity allows the continents to float and drift on these layers, a fundamental concept in the theory of plate tectonics. This explains continental drift and the movement of Earth's landmasses over geological time.

Geologists Have Found That the Upper Layers of the Mantle