Conducting Materials - Science fair project 3^rd grade

· All materials conduct electricity?

o The purpose of this experiment is to see if an electric current can pass through metals, air, water and plastic.

· Hypothesis

• The metal conducts electricity. Air, plastic and water don’t conduct electricity.

• Materials:

• Wood board
• Two 1.5 volt AAA battery
• Battery holder
• Buzzer
• Antenna
• Piece of iron rebar
• Plastic knife
• Plastic jar with water
• Aluminum foil
• Wires
• Glue
• Solder and solder gun
• Screws

· Procedure

1. Glue the battery holder and buzzer to the top of the board.

2. Solder a wire to one end of the battery holder cables.

3. Solder another to the other end of the battery holder and to the buzzer.

4. Solder a long wire one end to the free buzzer cable and the other to the antenna.

5. Strip the ends of the wires.

6. Screw the materials to the board.

7. Glue the small cup to the board.

8. Put batteries inside the battery holder.

9. One by one, touch the materials with the antenna.

• Observations

• When the buzzer sounds the electricity passes through the material. When I checked the water in the jar, the plastic and the air, the buzzer doesn’t sound. When I checked the aluminum foil and the rebar the buzzer sounds.

• Conclusion

o My hyphotesis was correct. The electricity did flow through the metals, but it did not flow through water, air and plastic.