Alarge volume of air that has nearly the same temperature and humidity at different locations at the same altitude is called

A large volume of air that has nearly the same temperature and humidity at different locations at the same altitude is called the Air Mass. Air mass covers hundreds or thousands of square miles and adapt to the characteristics of the surface below them at the same time they are also classified according to latitude and their continental or maritime source regions. 

Answer barren with few trees, in the northern hemisphere;