Question

unit exam - earth systems
which layer of the earth allows plates to slide around on its semi - plastic surface?
troposphere
asthenosphere
lower mantle

Explanation:

The asthenosphere is a semi - plastic layer in the upper mantle. It allows tectonic plates to slide due to its ability to flow slowly. The troposphere is part of the atmosphere and the lower mantle is more rigid compared to the asthenosphere.

Answer:

B. asthenosphere