Chapter 2: Population Part 1 Mr. Guge, Instructor Fall 2012 Distribution-geographers are concerned about the arrangement of features on the earth?s surface. 3 main properties of distribution are: Density-the frequency that something occurs in a given space. Concentration-changes in distribution-how close together-dispersed or clustered. Pattern-the arrangement of the distribution of features in a given space. 2 Density is an important issue in Population studies-the number of people per square mile in a country might tell you something about living conditions and living standards. Concentration-the population used to be clustered or concentrated in the northeast, but it is becoming more dispersed as many people move to the West, Southwest or South.