procedure

I am going to test if the number of coils affects the electromagnet's strength, and what types of materials can you wrap the wire around.

I will need a battery, a nail, a battery holder, a wire about 6 ft. long, about 60 paper clips, foil, a screw, and alligator clips. 1. Insert the battery into the holder. 2. Next I will take my nail and wrap the wire around it 20 times leaving two lose ends. 3. Connect both sides of the wire to the ends of the wires coming off the battery holder. 4. Hold a paper clip up to touch the nail, and let go to see if the paper clip will stay attached to the nail. 5. Keep holding paper clips up to the nail until the nail cannot hold any more. 6. Change the number of coils as you go to, 30 coils, 55 coils, and 70 coils. 7. Make a graph with coil 20, coil 30, coil 55, and coil 70, on the horizontal axis, and the number of paper clips picked up, on the vertical axis.