Discussion
Match each lifting mechanism with its description.
List I
A. Orographic
B. Convective
C. Frontal
D. Convergence
List II
1. warm air ascending over a denser air mass
2. air forced to rise over a mountain barrier
3. air piling up horizontally and forced upward
4. surface heating producing buoyant parcels
Answer: A
Correct answer: A-2, B-4, C-1, D-3
Four ways of lifting air, and everything else about the cloud follows from which one is at work. Orographic lifting forces the air over a mountain barrier. Convective lifting comes from surface heating making a parcel buoyant. Frontal lifting has warm air ascending over a denser air mass along a boundary. And convergence piles air up horizontally so that it has nowhere to go but up.
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