Geography a field of science devoted to the study of the lands, features, inhabitants, and phenomena of the Earth and planets.Geography is often defined in terms of two branches: human geography and physical geography.Human geography deals with the study of people and their communities, cultures, economies, and interactions with the environment by studying their relations with and across space and place.Physical geography deals with the study of processes and patterns in the natural environment like the atmosphere, hydrosphere, biosphere, and geosphere.