An unstable air parcel that rises through a stable layer eventually returns to its original level because
A)its density is less than that of the surrounding air
B)its density is greater than that of the surrounding air
C)its density remains the same despite vertical motions
D)vertical motions cannot change the air's density

Question

Quizplus · Accepted Answer

An unstable air parcel is one that rises because it is warmer and less dense than the surrounding air. However, if this air parcel rises into a layer of more stable air, its density becomes greater than the surrounding air, causing it to stop rising and eventually return to its original level.

An Unstable Air Parcel That Rises Through a Stable Layer