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AIR MASSES, FRONTS & PRESSURE SYSTEMS An ______________________________ a large body of air that develops over a particular region. __________________________________________form over _____________________________regions near the equator. They have ___________________________________________ T__________________________________________form over _____________________________regions near the equator. They have _____________________________________________ P___________________________________________ form over _______________________. m__________________________________________form over _____________________________regions near the equator. c- LABEL mPcP – mT – cT – Four types of fronts and map symbols A _________________________________________ is a boundary between air masses. Draw the symbol for each front in the correct colors RED and BLUE _________________________________ is noted by the first letter that is lowercase. ___________________________________________________front m –________________________________________________________ c –________________________________________________________ ___________________________________________________front _____________________________ is noted by the second letter that is uppercase. ___________________________________________________front ___________________________________________________front P –________________________________________________________ T –________________________________________________________ Label each front What is a cold front? A cold front forms when a ____________________ air mass pushes _______________________ a _________________________ air mass. What is a stationary front? A stationary front forms when a air mass and a air mass meets but Many days of , weather. Brings __________________________, _____________________ or ___________________. This produces ___________________________________ clouds. Cold fronts are followed by ____________________________________________________. What is a warm front? A warm front forms when a air mass moves a air mass. This produces What is an occluded front? An occluded front forms when a ____________________________________ air mass overtakes a ______________________ air mass. Brings temperatures with large amounts of___________________________. and clouds. Brings . Followed by __________________________________. QUIZ: WHAT HAVE YOU LEARNED ABOUT AIR MASSES AND FRONTS? Describe a maritime polar (mP) air mass, in terms of moisture and temperature. What is the name of an air mass that forms over water? What is the name of an air mass that forms over land? What is the name of an air mass that forms in a cold region? What is the name of an air mass that forms in a warm region? How do the air molecules circulate in a highpressure system? AND what does it cause the air to do in terms of the center of the system? What is the weather map symbol for a high-pressure system? (use your colors) Draw, Label and Color the High Pressure System Describe a continental tropical (cT) air mass, Moisture and temperature. The boundary between two air masses is called a ______________________. A cold air mass meets and pushes a warm air mass out of the way. What type of front am I? A warm air mass is trapped between to cold air masses. What type of front am I? A warm air mass meets and pushes a cold air mass out of the way. What type of front am I? I am a front that brings drizzly rain and am followed by warm clear weather. Name me. A cold air mass meets a warm air but neither is very strong. They are separated and many days of wet , cloudy weather occur. What type of front am I? Pressure Systems What is a low-pressure system? In the center of a low-pressure system what happens to the density of air? AND what does this level of density cause the air to do? What is air pressure? What kind of weather does a low-pressure system bring? What is a high-pressure system? What kind of air mass has a LOW pressure? In the center of a high-pressure system what happens to the density of air? How do the air molecules circulate in a highpressure system? AND what does it cause the air to do in terms of the center of the system? AND what does this level of density cause the air to do? What kind of weather does a high-pressure system bring? What kind of air mass has a HIGH pressure? What is the weather map symbol for a low-pressure system? (use your colors) What weather instrument is used to measure air pressure in the atmosphere? What unit of measure is used when measuring air pressure? Draw, Label and Color the High Pressure System Compare/Contrast Chart: High and Low Pressure High Pressure Low Pressure Moving inward on isobars… Density of air Representation on a map Motion of air Also known as… Motion of air causes a zone of… Stability of atmosphere More Pictures…… On the Weather Map, Circle the High Pressure Systems in BLUE, Circle the Low Pressure Systems in RED. What to types of fronts are on the Weather Map?