Student responses that correspond to the parts of the presented water flow model.
| Water Flow Model | Adequate | Inadequate | ||
| water level difference | voltage(37), intensity of voltage(1) | 38 (86.4%) | electric current(2), intensity of current(1), resistance(1), No response(2) | 6 (13.6%) |
| pump | battery(42), voltage source(1) | 43 (97.7%) | light bulb(1) | 1 (2.3%) |
| valve | switch(44) | 44 (100%) | 0 | |
| pipe | conduction wire(41), electric wire(3) | 44 (100%) | 0 | |
| watermill | resistance(1), light bulb(42) | 43 (97.7%) | battery(1) | 1 (2.3%) |