Question

question 9 of 15
____ ____ causes columns of clouds to spin, and may form a funnel cloud.
(2 words)

Explanation:

In meteorology (a subfield of Natural Science, specifically related to atmospheric processes), wind shear (the change in wind speed or direction with height) can cause columns of clouds to start spinning. This rotational motion is a key precursor to the formation of funnel clouds (and potentially tornadoes), as the shear creates the necessary vorticity for the cloud column to rotate.

Answer:

Wind Shear