Final answer:
Air masses primarily form in low pressure zones and can form in temperate regions.
Step-by-step explanation:
In terms of weather, low-pressure systems occur when the earth's surface atmospheric pressure is lower than the surrounding environment. Moist air rises and condenses, producing clouds. Movement of moisture and air within various weather fronts instigates most weather events. Air masses are large bodies of air that have similar temperature and humidity characteristics. While air masses can form in both high and low pressure zones, they are primarily associated with low pressure zones. They can form in temperate regions as well as other regions around the world.