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Air Masses
| Question | Answer |
|---|---|
| a huge body of air that has similar temperature, humidity, and air pressure at any given height | Air mass |
| How are air masses classified? | temperature and humidity |
| In the US, how do air masses move? | generally by prevailing westerlies and jet stream |
| a band of high speed winds 6-14km above Earth’s surface that carry air masses beneath them. | jet stream |
| What is the direction that air generally moves in the US? | move from west to east (prevailing westerlies) |
| What does movement f air masses and their interactions have a great impact on? | the weather |
| Name the four types of air masses | maritime tropical, continental tropical), maritime polar , and continental polar |
| Two words to describe maritime tropical | warm, moist |
| Two words to describe maritime polar | cool, moist |
| Two words to describe continental polar | (cold, dry) |
| Two words to describe continental tropical | (hot, dry |
| Where do maritime air masses form? | over oceans and are very humid |
| boundary where air masses meet | front |
| What are the 4 types of fronts | cold, warm, stationary, occluded |
| The type of front that causes heavy rains and winds, thunderstorms, tornadoes weather cools and skies clear as cold front passes | cold front |
| How does a cold front form? | cold air mass runs into warm air mass |
| How does a warm front form? | a fast moving warm air mass overtakes a slower moving cold front |
| The type of front that causes light rain or snow if air is humid. | warm front |
| How does an occluded front form? | a warm air mass gets caught between two cold air masses. |
| When a cold and warm mass meets and neither one can move the other, the type of front is? | stationary |
| What kind of front can bring many days of clouds and precipitation? | stationary |
| What do all the different types of fonts have in common? | They are all created by the interaction of warm and cool air masses. |
| a swirling center of low air pressure Winds spiral into the center. | cyclone |
| a high pressure center of dry air Wind spirals away from the center | anticyclone |
| How does a cyclone form? | A low pressure front forms in the center due to the warm air rising. Cool air comes in from areas with higher pressure. The winds spiral inward in a counterclockwise direction. The rising air forms clouds and precipitation. |
| True or Fase: A hurricane is a cyclone.l | true |