Ben read about the three ways to increase the magnetic field strength around an electromagnet: increase the number of coils, decrease distance from the coils, and increase voltage through the coils. He read about how to create an electromagnet and analyzed the step-by-step diagram. He diagrammed the three ways to increase electromagnet field strength in the 3-Dimensional Thinking. He completed Collect Evidence A. He completed the lab "Electromagnet Challenge" which experimented with making an electromagnet and changing its strength. He recorded his data and answered the follow-up questions. He completed 3-Dimensional Thinking on page 246.