A cold front forms when a cold air mass runs into a warm air mass (Figure below). The cold air mass moves faster than the warm air mass. ... As the warm air rises, its water vapor condenses. Clouds form, and precipitation falls.
What happens when a cold air mass moves in quickly and takes over a warm air mass?
When an air mass moves over a new region, it shares its temperature and humidity with that region. ... For example, when a colder air mass moves over warmer ground, the bottom layer of air is heated . That air rises, forming clouds, rain, and sometimes thunderstorms.
What happens when a cold air mass bumps into a warm air mass?
When a moving cold air mass meets a warm air mass, that is lighter, it tends to wedge below the latter, thus giving origin to a cold front. The warm air is forced upwards and its ascent causes the formation of clouds .
What happens when a cold air mass moves quickly cold front into a warm moist air mass quizlet?
A cold air mass moves quickly under a slower-moving warm air mass. ... A tornado is more likely to form along a cold front in which warm, moist air rises more rapidly than it does in a warm front. You just studied 5 terms!
What happens when a cold front runs into a warm front?
When a cold front overtakes a warm front, it creates what’s called an occluded front that forces warm air above a frontal boundary of cooler air masses .
What kind of front occurs when a cold air mass replaces a warm air mass?
A cold weather front is defined as the changeover region where a cold air mass is replacing a warmer air mass. Cold weather fronts usually move from northwest to southeast. The air behind a cold front is colder and drier than the air in front.
What is a warm air mass?
[′wȯrm ¦er ′mas] (meteorology) An air mass that is warmer than the surrounding air ; an implication that the air mass is warmer than the surface over which it is moving.
What usually happens when two air masses meet select all that apply?
When two air masses meet together, the boundary between the two is called a weather front . At a front, the two air masses have different densities, based on temperature, and do not easily mix. One air mass is lifted above the other, creating a low pressure zone.
Why do clouds form when a warm air mass collides with a cold air mass?
Cold air is more dense than warm air , so when a warm air mass meets a cold air mass, the cold air ends up below the warm air. Once the air has risen, it cools and clouds can form.
What causes air masses to move around?
Winds and air currents cause air masses to move. Moving air masses cause changes in the weather. A front forms at the boundary between two air masses. Types of fronts include cold, warm, occluded, and stationary fronts.
What is most likely to occur when a fast-moving cold air mass moves into a region of warmer moist air?
They move from areas of high pressure to areas of low pressure. Which most likely occurs when a fast-moving cold air mass moves into a region of warmer, moist air? It causes heavy precipitation for a short period of time . You just studied 13 terms!
What air mass is warm and dry?
Maritime air masses form over water and are humid. Continental air masses form over land and are dry. Therefore, an air mass that develops over northern Canada is called a continental polar air mass and is cold and dry. One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid.
What is a large body of air with a uniform temperature and moisture?
An air mass is a large body of air with generally uniform temperature and humidity. The area over which an air mass originates is what provides its characteristics. The longer the air mass stays over its source region, the more likely it will acquire the properties of the surface below.
What will happen to the air just above the ground that becomes warmer?
Warm air rises, creating a low pressure zone ; cool air sinks, creating a high pressure zone. ... Since it can then hold more moisture, the descending air will evaporate water on the ground. Air moving between large high and low pressure systems creates the global wind belts that profoundly affect regional climate.
How can you tell if a front is warm or cold?
If cold air is advancing into warm air , a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists. Otherwise, a stationary front is present if the cold air is neither advancing nor retreating from the warm air mass.
What is a fast moving warm air mass overtakes a slower moving cold air mass?
Cold front : a fast-moving cold air mass overtakes a warm air mass; the warm air is pushed upward. Warm front: a warm air mass overtakes a slow-moving cold air mass; warm air moves over the cold air.
