Sara and Michael tested electromagnets to see the size of wire they used would make the magnets stronger. They


felt that the thicker the wire, the stronger the magnet would become. They selected 6 steel nails of the same size to


make the magnets. Using 6 different sizes of insulated wire, they put 50 turns around each nail. Then each nail was


hooked to 2 D cell batteries to make electromagnets. The strength of each magnet was tested by counting the


number of paper clips which could be picked up by the electromagnet. They started with the smallest type of wire


first.


Experimental Group_


Control Group


Hypothesis


Independent Variable


Dependent Variable


Controlled Variables