It isn't really either of those things. However, it will produce cold fronts as the cold air displaces the warmer air.
Warm air rises at the equator and cold air sinks at the poles. Warm air expands and cool air contracts and compresses.
Warm air molecules are fast moving and therefore less dense than cold air molecules. Since cold air is more dense (more slowly moving) it sinks.
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When warm air pushes into cold air the result is a warm front.
cold air has more water vapor so it sinks warm air does not have so much
Warm air rises,and then sinks when the air is cold.
Warm air rises at the equator and cold air sinks at the poles. Warm air expands and cool air contracts and compresses.
warm front is low pressure , cold front high pressure . because it pushes down on the surface (because cold air sinks) it makes high pressure .
warm air rises cold air goes down sinks
Warm air is lighter then cold air. So the cold air sinks and the warm air raise.
Warm air molecules are fast moving and therefore less dense than cold air molecules. Since cold air is more dense (more slowly moving) it sinks.
When colder air advances toward warm air. The cold air wedges under the warm air like a plow. As the warm is lifted it cools and water vapor condenses forming clouds
Convection Currents
Warm air rises. Cold air sinks.
cold air sinks, warm air rises, and warm air can hold more water vapor than cold air can.
Warm air is lighter and therefore rises. Cold air holds more water and is heavier. Cold air sinks lower than warm air.
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