What happens when a warm and cold air mass collide?
When a warm air mass meets a cold air mass, the warm air rises since it is lighter. As it rises, the warm air cools rapidly. This configuration, called a cold front, gives rise to cumulonimbus clouds, often associated with heavy precipitation and storms.
What are 4 ways air can be forced upward?
– There are four lifting mechanisms that form clouds: Orographic Lifting, Convection, Convergence, and Updraft. – Orographic lifting is when air cannot go through a mountain, and so it flows over it. – Frontal Lifting is when less dense warm air is forced to rise over cooler, denser air as a weather fronts move.
What are three conditions that cause air to rise?
Science Chapter 8 Part 1
| A | B |
|---|---|
| three ingredients for clouds | water, rising air, dust |
| three things that cause air to rise upward, often forming clouds | solar heating, mountains, fronts |
| the three kinds of fog | steam, radiation, sea |
| three major wind systems | trade, prevailing westerlies, polar easterlies |
Why do air masses cool as they are forced upward?
The warmer air mass is less dense than the colder air mass. In other words, the warmer air mass is forced to rise over the colder air mass. As air from the warm air mass rises, it cools, leading to the development of clouds and maybe precipitation. Large areas of clouds and precipitation are common near weather fronts.
What will happen to the air just above the ground that becomes warmer?
When warm air rises and cools in a low pressure zone, it may not be able to hold all the water it contains as vapor. Some water vapor may condense to form clouds or precipitation. When cool air descends, it warms. Since it can then hold more moisture, the descending air will evaporate water on the ground.
What happens when 2 different air masses meet?
Air masses do not usually mix. So, when two different air masses meet, a boundary is formed. The boundary between two air masses is called a front. Weather at a front is usually cloudy and stormy.
What would happen if a cold dry air mass pushes into warm humid air mass?
A cold front occurs when a cold air mass advances into a region occupied by a warm air mass. If the boundary between the cold and warm air masses doesn’t move, it is called a stationary front. The cold air pushes the warm air upwards, which may be followed by precipitation or storms due to moisture in the air.
What air mass is it when cold air sinks?
A cold front is when a cold air mass pushes into a warm air mass. The heavier cold air sinks and slides in under the warm air. The cold air forces the warm air steeply upward along the front. This causes cumulus and cumulonimbus clouds to form.
Which best explains how El Nino affects the jet stream?
Which best explains how El Niño affects the jet stream? The jet stream is pushed north and results in increased precipitation. The jet stream is pushed south and results in increased precipitation. The jet stream is pushed north and results in decreased precipitation.
What are three things that impact the jet stream?
The seasons of the year, location of low and high pressure systems and air temperature all affect when and where a jet stream travels.