This study involved surveying three groups of students regarding their ideas about the structure, scale, and percieved importance of groundwater. The survey results show that many participants selected sizes of groundwater structures that mirrored surface analogs; however, some students applied scales on the order of houses and skyscrapers to typical pore and crack structures. The authors’ research indicates that students bring to the classroom many misconceptions that are well-positioned to interfere with their understanding of hydrogeologic principles.