Air Mass/Fronts Air Mass: Large body of air with uniform temperature and humidity *Air Masses are classified by their temperature and humidity. There are 4 major types: Maritime tropical (Mt) Continental tropical (Ct) Maritime polar (Mp) Continental polar (Cp) (Warm, Wet) (Warm, Dry) (Cold, Wet) (Cold, Dry) *Air Masses can move slowly or quickly (depending on size). Front: is the leading edge of a moving air mass. There are 4 types: Cold Front: dense, cloudy, precipitation, wind. Warm Front: less dense, warm, humid (clouds, precipitation) H Stationary Front: Cold/Warm Fronts meet, move slowly, lots of clouds, precipitation Occluded Front: warm air trapped between two cold air masses, may cause severe weather Warm air rises because its density is low. Cold air sinks because its density is higher. L