In this activity, students will gain a better understanding of where space begins. They will use a map scale to determine the relative distance to space from the surface of a map. They will then stack coins the appropriate height to mark the edge of space. Materials State or county maps with scale distance bars (can be printed or displayed from online maps) OR download Los Angeles area map (PDF) Various coins, metal washers, or other thin stackable items Ruler with millimeter markings Managemen