Human geography is one of the two major sub-fields of the discipline of geography. Human geography is the study of human use and understanding of the world, the spatial differentiation and organization of human activity and its interrelationships with the physical environment. Human geography differs from physical geography mainly in that it has a greater focus on studying human activities and is more receptive to qualitative research methodologies. Broadly speaking, human geography is a social science discipline, while physical geography is an earth science. Human geography is concerned with the study of spatial patterns of interactions between human beings and their physical environment.