MR / Schenectady, New York. Elmer Avenue Elementary School (urban public school). Grade 3. One of a series of photographs of an earth science experiment on the hydrologic cycle focusing on soil erosion and surface runoff in an ecosystem. Students simulate rainfall by pouring water on soil, observing its effects, then draining and observing the runoff. Girls (Age 8, Age 9) points to surface run off in her group's mini-ecosystem as she and her partner acticulate observations they will record in their science journals. ID: AJ-g3m. MR: Wei6, Bri6. ©Ellen B. Senisi