What characterizes a cold front?

What characterizes a cold front?

• A. Front stalls and brings no weather
• B. Warm air rises over cold air
• C. Cold air pushes under warm air, causing storms
• D. Warm air sinks and causes drought

Answer: (C)

Cold fronts are the boundary where cold, dense air advances and wedges underneath warmer air. That vertical push lifts the warm air, cooling and condensing it to form clouds and often triggering storms or heavy precipitation. After the front passes, temperatures tend to drop and winds can shift, making the weather noticeably more unsettled for a time. This matches the idea that cold air pushes under warm air, leading to stormy weather. The other descriptions mix up the dynamics of different air-mass interactions: a stalled front doesn’t reflect the active movement typically producing weather; a warm front involves warm air moving over cold air; drought isn’t produced by the sinking of warm air in this context.

Cold fronts are the boundary where cold, dense air advances and wedges underneath warmer air. That vertical push lifts the warm air, cooling and condensing it to form clouds and often triggering storms or heavy precipitation. After the front passes, temperatures tend to drop and winds can shift, making the weather noticeably more unsettled for a time. This matches the idea that cold air pushes under warm air, leading to stormy weather. The other descriptions mix up the dynamics of different air-mass interactions: a stalled front doesn’t reflect the active movement typically producing weather; a warm front involves warm air moving over cold air; drought isn’t produced by the sinking of warm air in this context.