IL.17. Geography: Understand world geography and the effects of geography on society, with an emphasis on the United States.
17.A. Locate, describe and explain places, regions and features on the Earth.
17.A.3a. Explain how people use geographic markers and boundaries to analyze and navigate the Earth (e.g., hemispheres, meridians, continents, bodies of water).
17.A.3b. Explain how to make and use geographic representations to provide and enhance spatial information including maps, graphs, charts, models, aerial photographs, satellite images.