Queston #1: What are Air Masses and Fronts?

Air masses are the volume of the air that travels over land. These bodies travel thousands of miles on the surfaces of land. Cold air masses are classified as polar/arctic and warmer ones tend to be determined as tropical due to their humidity. Fronts are the separation of different air masses. As colder fronts tend to cause severe storms like thunderstorms; warm fronts cause large amounts of fog.