A cold front forms when which air mass interaction occurs?

A cold front forms when which air mass interaction occurs?

• A. A continental tropical air mass pushes into a maritime polar air mass
• B. A maritime polar air mass pushes into a continental tropical air mass
• C. A polar maritime air mass pushes into a tropical continental air mass
• D. A tropical maritime air mass pushes into a polar continental air mass

Answer: (B)

Cold fronts form when a cooler air mass advances into a warmer air mass, forcing the warm air to rise rapidly and condense into clouds. Maritime polar air is cool and moist, while continental tropical air is hot and dry. When the cooler maritime polar air pushes into the warmer continental tropical air, it slides under the warm air, lifting it and creating the sharp boundary and often storms associated with a cold front. The other interactions involve warm air moving into cooler air, which creates warm fronts rather than cold fronts.

Cold fronts form when a cooler air mass advances into a warmer air mass, forcing the warm air to rise rapidly and condense into clouds. Maritime polar air is cool and moist, while continental tropical air is hot and dry. When the cooler maritime polar air pushes into the warmer continental tropical air, it slides under the warm air, lifting it and creating the sharp boundary and often storms associated with a cold front. The other interactions involve warm air moving into cooler air, which creates warm fronts rather than cold fronts.