Question

A map of North America with points labeled A and B. A: Center of Canada. B: In the ocean, South of Alaska.
Use the drop-down menu to identify which type of air mass would form at each point on the map.

Point A

Point B

Answer 1

Point A — continental polar (cP).
Reason: forms over the cold, dry interior land of Canada (cold, dry air mass).

Point B — maritime polar (mP).
Reason: forms over the cold North Pacific south of Alaska (moist, cool air mass that often brings cloudy, wet weather).