An air parcel is considered unstable when it
A)it ceases to ascend.
B)continues to rise until it reaches an altitude at which the surrounding air has a similar temperature.
C)either remains as it is,or changes its initial position.
D)it resists displacement upward.

Question

Quizplus · Accepted Answer

An air parcel is considered unstable when it continues to rise until it reaches an altitude at which the surrounding air has a similar temperature. This occurs when the parcel is warmer than the surrounding environment and is thus less dense. As it rises, it expands and cools at a slower rate than the environment, causing it to be warmer than the surrounding air at higher altitudes. This process continues until the parcel reaches an altitude where it is no longer warmer than the surrounding environment, at which point it ceases to rise.

An Air Parcel Is Considered Unstable When It