Air Masses and Fronts
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each of the black spaces below before clicking
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Help!
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| What is an "air mass"? | A hugh body of air that has similar temperature, humidity, and air pressure throughout it
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| Air masses are "classified" or group by what properties? | Temperature and Humidity are used to classify air masses.
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| Tropical, or warm means? | Tropical air masses are warm, air masses that form in the tropics and have low air pressure.
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| Polar, or cold means? | Polar air masses are cold, air masses from north of 50 degrees latitude and south of 50 degrees latitude and have "high" air pressure.
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| Maritime, or over water means? | Maritime air masses form over oceans and are humid
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| Continental, or over land means? | Continental air masses form over land, in the middle of continents, and are dry.
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| What are the four major types of air masses that influence the weather in North America? Hint: Over Water and Over Land | Maritime tropical, continental tropical, maritime polar, and continental polar.
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| What do Maritime Tropical (over water) air masses from the Gulf of Mexico? | They bring warm, humid air to the Eastern US
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| What do Maritime Tropical (over water) air masses from the Pacific Ocean bring to the West Coast(California)? | Maritime Tropical air masses from the Pacific Ocean bring: warm, humid air to the West Coast/California.
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| Continental Tropical(over land, humid) air masses from the Southwest bring? | Continental Tropical air masses bring hot dry air to the Southern Great Plains.
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| Continental Polar(over land, cold) air masses from the central and northern Canada bring? | Continental Polar air masses from Canada bring cold air to the central and eastern US.
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| Maritime Polar (over water, cold) air masses occur where? | Maritime Polar air masses from the Atlantic Ocean are pushed out to sea/ocean by westerly blowing winds.
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| What does "prevailing westerlies" mean? | Prevailing Westerly winds are winds that blow across the United States from West(California) to the East (New York)
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| As air masses move across the land and oceans they bump into each other. If they have different temperatures and densities, do they mix? | No, they do not mix. They create a rain storm or wind storm or other storm. This is called a "front".
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| What are the four major types of fronts? | Cold Front, Warm Front, Stationary Front, and Occluded Fronts.
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| What is a cold front? | It is when cold air moves underneath warm air, forcing the warm air to rise.
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| Do cold fronts move quickly or slowly? What type of air does a cold front bring? | Cold fronts move quickly. Cold fronts bring cold dry air.
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| When does a warm front develop? | A warm front develops when warm air moves over cold air.
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| Do warm fronts move quickly or slowly? What type of air does a warm front bring? | A warm front moves slowly. A warm front brings warm humid air.
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| What is a stationary front? Hint: Stand Still. | A stationary front forms when cold and warm air masses meet but neither one has enough force to push the other one. They just sit there and become stationary. Don't move.
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| What does "occluded" mean? | Occluded is when a warm air mass is cut off from the ground. It usually causes clouds and precipitation(rain or snow) to occur.
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| What is a swirling center of low air pressure called? Hint: Brooklyn cyc.... | A swirling center o flow air pressure is called a "cyclone.
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| What is another name for a Cyclone? | Cyclones are also called: "lows" because of the low air pressure.
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| Cyclones and decreasing air pressure are associated with? | Cyclones and decreasing air pressure are associated with storms and precipitation.
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| What are "Anticyclones"? | Anti-cyclones are high pressure centers of dry air
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| What is another name for "Anticyclones"? | another name for Anti-cyclones are "highs" because of the high air pressure.
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| Anticyclones lead to what type of weather? | Anticyclones lead to dry, clear weather.
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| What direction do winds spin in the Northern Hemisphere? | In the Northern Hemisphere winds spin in a counter clockwise direction in a cyclone and clockwise in an "anticyclone".
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