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What happens when a warm air mass meets a cold air mass?

  1. The warm air sinks

  2. The cold air pushes the warm air upward

  3. Both air masses remain stationary

  4. The warm air cools rapidly

The correct answer is: The cold air pushes the warm air upward

When a warm air mass meets a cold air mass, the less dense warm air rises over the denser cold air. This process is a fundamental aspect of atmospheric dynamics and is critical for understanding weather patterns. The warm air, being lighter, cannot be supported by the heavier cold air, resulting in the warm air being pushed upwards. This upward movement of warm air can lead to condensation and cloud formation, which may result in precipitation. This interaction plays a significant role in the development of various weather phenomena, such as fronts and storms. The behavior of the air masses in this context highlights the principles of buoyancy and density in atmospheric science, illustrating why the correct choice focuses on the cold air's role in lifting the warm air upwards.