Question

which statement best describes a characteristic of maritime polar air masses?
○ they occur mostly during the summer.
○ they form over water with cool, moist air.
○ they bring dense, heavy snow in the winter.
○ they have cool, dry air that forms over land.

Explanation:

Maritime air masses form over water, picking up moisture, and polar air masses originate in cool, high-latitude regions. Combining these, maritime polar air masses are cool and moist, forming over water. The other options are incorrect: they can occur in multiple seasons, do not typically bring heavy dense snow (that is more associated with continental polar or maritime continental), and dry air over land describes continental air masses.

Answer:

B. They form over water with cool, moist air.