Elenco Snap Circuits® Home Learning - Manual (Page 19)

Material Prediction Test Result
Clean steel nail
Rusty nail
Piece of chalk
Rubber eraser
Plastic straw
Brass paper fasteners
Copper penny
Aluminum foil strip
Rubber band
Material Prediction Test Result
Key
Cardboard strip
Wooden craft stick
Plastic ruler
Metal paperclip
Plastic coated paperclip
String
Pencil lead from a
mechanical pencil
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Materials List
2 2-Snap Wires
1 Battery Holder (B1)
1 LED (D1)
1 100 Ohm Resistor (R1)
1 Red Jumper Wire
1 Paper clip (uncoated)
Build the circuit as shown.
Listed below are items that you will place across the terminals one at a time to determine if they are conductors (allow electricity
to flow) or insulators (prevents the flow of electricity). Use the jumper wire shown to bridge the gap when testing small items
such as a penny. First predict which materials are conductors or insulators by filling in the blue column in the table below.
To make sure the circuit is
working properly, place a paper
clip across the opening between
the two 2 snap wires as shown
here. The LED should light up.
When you place the paper clip
across the terminals as shown,
current flows from the batteries
through the resistor, then the
LED, then back to the batteries.
The paper clip completes the
circuit.
Test each item and write the result (conductor or insulator) in the green column.
What do all conductors have in common? ___________________________________________________________________
List 2 examples of uses for conductors. ___________________________________________________________________
Which materials are good insulators? ___________________________________________________________________
List 2 examples of insulators used in everyday life. _____________________________________________________________
Activity 8
Conduction Detector