An air mass is a large body of air that has uniform temperature and humidity characteristics. These properties are influenced by the area over which the air mass forms, such as oceans, deserts, or polar regions. Air masses can be classified into different types, including tropical, polar, continental, and maritime, based on their source regions. When air masses move, they can interact with other air masses, leading to various weather phenomena. For example, when a warm tropical air mass meets a cold polar air mass, it can create storms and precipitation. Understanding air masses is essential for meteorology and predicting weather patterns.