The globe is a model of the earth.
Some maps use colour coding to show elevation.
If the students must use an atlas in which the index uses longitude and latitude coordinates, some instruction in this area will be necessary. International Date Line equator Arctic and Antarctic Circles measurement using degrees Time zones generally follow lines of longitude. Boundaries may coincide with natural barriers such as water or mountain ranges. Vegetation regions may indicate the types of crops that may be grown in an area. Climate and soil largely determine the types of crops that may be grown in a region.