http www marcsobservatory commowhatsithemispheres html AIR MASSES FRONTS

http: //www. marcsobservatory. com/mo_whatsit_hemispheres. html AIR MASSES & FRONTS http: //www. atmos. washington. edu/~ovens/loops/wxloop. cgi? fronts_ir+/48 h/

air mass- large bodies of air covering land ocean areas 1. Continental -air mass that forms over land 2. Maritime- air mass that forms over water http: //www. youtube. com/watch? v=Kmhizd 4 De 2 E http: //www. youtube. com/watch? v=kz. NR_tj. KEx. U&feature=related

CHARACTERISTICS OF AIR MASSES Antarctic- cold mass -forms over the Antarctic Arctic- cold mass –forms over the Arctic Polar- cold mass – forms in polar regions Tropical- warm air mass –form in the Tropics Equatorial- warm air mass –forms at the Equator http: //www. youtube. com/watch? v=r. Qbquj. JGJRg http: //www. videopediaworld. com/video/32291/Weather-Types-Of-Air-Masses

AIR MASSES Read/Complete “Changes in Weather: Air Masses”, pp. 45 -46

FRONTS stationary and occluded Front – the area where two different air masses meet/They move but do not mix! Blue lines are cold fronts and red lines are warm fronts http: //www. youtube. com/watch? v=v. PC 5 i 6 w 3 y. DI&feature=related

COLD FRONT Cold Front- when a cold air mass meets up with a warm mass or air a cold front forms---brings precipitation-afterwards, temp drop, winds change and barometer rises

WARM FRONT Warm Front – When a warm air mass meets up with a cold air mass – extended periods of precipitation –afterwards temps usually rise

OCCLUDED FRONT a composite front when colder air surrounds a mass of warm air and forces it aloft. http: //www. youtube. com/watch? v=LTA 2 p. Ni. KDXI

FRONTS Read/Complete “Changes in Weather: Fronts”, pp. 47 -48