Geography is the study of the earth and how people live on and use it. It includes five main themes: location, place, human-environment interaction, movement, and regions. Location refers to where places are found through coordinates or landmarks. Place examines the physical and human characteristics of an area. Human-environment interaction considers how humans affect and are affected by their surroundings. Movement looks at how people, goods, and ideas are exchanged between places. Regions are areas that share common physical or human features.