An immense body of air characterized by similar properties at any given altitude is known as a(n) _____.

Air mass :)

An immense body of air characterized by similar properties at any given altitude is known as an air mass. An air mass is a large volume of air that has relatively uniform temperature and moisture content. These air masses form over specific source regions, such as polar regions or tropical oceans, and can have distinct characteristics due to the temperature and humidity conditions of their source region.