Make Sense of Good and Poor Experiment Designs

In your test of the relationship between magnet size and strength, you used at least two magnets made of the same material. One-half of your class used a third magnet also made of the same material. The other half of your class used a third magnet made of a different material (silver). Would your conclusion for the experiment be any different if those teams who had used magnets all made of the same material had been considered separately from those teams who used a magnet made of a different material? To consider that, divide the magnet experiment data into two parts: one where the three magnets were made of the same material, and another where one magnet was made of a different material.

Complete Table 2 on your record sheet. Use the rankings of those teams who used magnets all made of the same material. Record in each cell.

Complete Table 3 on your record sheet. Use the rankings of those teams who used magnets including one made of a different material. Record strongest, middle, or weakest in each cell.