A Question of Rivers: Interactive Picture Quiz | Grade 8-11 Geography General Information: An interactive nine-number picture board on rivers where each numbered tile links to a photo and question, and then detailed explanation slides. Topics include potholes and abrasion, Scotland’s River Tay, upper-course characteristics (interlocking spurs, steep gradients), confluences, waterfalls, U-shaped glacial valleys with misfit streams, floodplains, meanders, ox-bow lakes, levees, and differences betw