Air Masses and Fronts

Study the image. Warm and cold air fronts with points labeled 1 through 4. 1: cold air entering from the left and moving down. 2: clouds with rain. 3: warm air entering from the right and moving up. 4: warm air entering from the top left and moving down toward the clouds. At which point is cool air circulating beneath warm air? 1 2 3 4

1

Study the image, which shows warm and cold air fronts. Warm and cold air fronts with points labeled 1 through 4. 1: cold air entering from the left and moving down. 2: clouds with rain. 3: warm air entering from the right and moving up. 4: warm air entering from the top left and moving down toward the clouds. At which point does warm air begin to rise before colliding with cold air? 1 2 3 4

3

How does the weather caused by a warm front compare to the weather caused by a cold front? A warm front brings fog, but a cold front brings clouds that form from dry air. A warm front brings rapid changes in weather, but a cold front brings slow changes in weather. A warm front brings widespread cloud cover, but a cold front brings intense sun coverage. A warm front brings rain in humid air on occasion, but a cold front brings thunderstorms in summer.

A warm front brings rain in humid air on occasion, but a cold front brings thunderstorms in summer.

Study the image, which describes how rapid changes in weather conditions occur. How rapid changes in weather conditions occur. Arrow labeled Direction of frontal movement points right toward Cold front map symbol. Arrow labeled Rising warm air in front of cold front points from cold front to sky. Also labeled are: Development of clouds because of upward movement of warm air, and Advancing cold air behind cold front. Based on the arrows, what does the image represent? Air masses are barely moving. Air masses are colliding with each other. Jet streams are forming in the upper atmosphere. Weather conditions are remaining steady and unchanged.

Air masses are colliding with each other

The images show two different fronts. Item A: A cold front and warm front meet with high level, grey clouds. Item B: Warm air is above cold and very cold air, lower clouds with rain falling. Which fronts are shown? Item A shows a cold front, and item B shows a warm front. Item A shows an occluded front, and item B shows a cold front. Item A shows a warm front, and item B shows a stationary front. Item A shows a stationary front, and item B shows an occluded front.

Item A shows a stationary front, and item B shows an occluded front.

What causes air masses to move? A difference in air pressure and temperature occurs. Weather conditions change rapidly to produce storms. A collision takes place between two natural wind patterns. Long, narrow bands of wind blow in the upper atmosphere.

Long, narrow bands of wind blow in the upper atmosphere.

Warm air and cool air mix in Region A, while rapid weather changes occur in Region B. Which fronts are occurring in the regions? There is a cold front in Region A and a warm front in Region B. There is an occluded front in Region A and a cold front in Region B. There is a warm front in Region A and a stationary front in Region B. There is a stationary front in Region A and an occluded front in Region B.

There is an occluded front in Region A and a cold front in Region B.

Study the images of two different fronts. Item A: Arrows for a cold front and warm front meet with high level, grey clouds. Item B: Arrows for a cold front and warm front are moving in the same direction. The warm front is above the cold front. Based on arrow movement, why is the front shown in item A different from the front shown in item B? Warm air rises above cold air in item A, while two air masses collide in item B. Cold air mixes with warm air in item A, while two air masses barely move in item B. Warm air is pushed upward near cold air in item A, while a boundary forms in item B. Two air masses form a boundary in item A, while warm air rises above cold air in item B.

Two air masses form a boundary in item A, while warm air rises above cold air in item B.

Which major type of air mass typically brings cool, dry weather? maritime polar continental polar maritime tropical continental tropical

continental polar

Study the image. A world map showing the Principal World Air Masses. The four major types of air masses are noted on the map. What type of weather are the upper part of Africa and the lower half of Asia most likely experiencing, based on the image? rainfall dry heat cold breezes thunderstorms

dry heat

Which kind of weather usually forms over the northwest United States in the summer because of maritime polar air masses? fog dry heat heavy snow heavy rain

fog

Study the image. Earth showing air mass movement. Purple and red arrows are moving in a counterclockwise direction. Based on the arrows, in which direction are air masses moving? from west to east from north to south toward the equator toward the middle latitude

from west to east

Study the image, which shows an air mass moving into a region. An area of warm, moist air is moving inland over the United notes. What type of weather will this region most likely experience due to the incoming air mass? thick fog with cold air sunny skies with warm air thunderstorms and heavy rain cooler temperatures with no rain

thunderstorms and heavy rain