See that magnet come in a variety of sizes, shapes and strengths. Test magnet attraction to varying sizes of paper clips. Collect and organize data. Record data on data collection sheet. Teacher Knowledge Magnets may vary in magnetic strength even if the magnets are the same size and shape.
Magnets also weaken over time.
Helpful Hints 1. Make surepaper clips are separated after placing in the pool. Also, students may need a reminder about appropriate behavior when working with water. In a group of 2-4, students should fish for the paper clips and record what they caught. The student should keep a tally mark at this time.