Ideal for laboratory investigations by small groups of students in the study of stream types, stream development, erosion cycles, deltas, sedimentation & beach formations. Sturdy plastic tray is large enough for group study or individual investigation regarding rate of erosion as related to slope & stream volume. Includes heavy plastic tray, 48" x 14" x 3", with drain, trough, 36" x 2" radius, support to raise tray or trough, siphon tube with clamp, 72" x 1/4". Sand not included. Grades 4-12. |
