The figure below shows a layer of relatively fast-moving air overlying a layer of more slowly moving air. Where do eddies and turbulent air motions likely form?
A)in the bottom layer
B)in the top layer
C)in the boundary between the two layers

Question

The figure below shows a layer of relatively fast-moving air overlying a layer of more slowly moving air. Where do eddies and turbulent air motions likely form? ​ 
A)in the bottom layer 
B)in the top layer 
C)in the boundary between the two layers

Quizplus · Accepted Answer

Eddies and turbulent air motions are likely to form in the boundary between the two layers where there is a significant difference in airflow velocity. This boundary is known as the shear layer or the mixing layer, where the two layers interact and exchange momentum through the formation of eddies and turbulent motions.

The Figure Below Shows a Layer of Relatively Fast-Moving Air