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Students will use knowledge about conductive materials to build a circuit using at least 3 different materials.

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9 Volt Battery with Snap Connector
2-3 LED Bulbs
Playdough (normal kind)
Safety Goggles
Various conducting materials from 2 weeks ago: Paper Clips, Pennies, Copper, etc.

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Explain the objective. Students will be using the provided materials to create a working circuit, using at least 3 different materials.

Remind them that the LED legs cannot touch the wires (or other conducting materials) directly.

Brainstorm ideas for building a long circuit. Help students develop ideas about how they can connect their circuit without letting the LED legs touch the conductors.

One idea is to make lots of logs of playdough and connect them all with paper clips.

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Circuits Worksheet

S.INQ Process Grid Printout

S.INQ Circuit Worksheet

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Make sure students are wearing their safety goggles. Make sure the instructor is modeling the behavior by also wearing goggles.
Divide students into groups and give them their supplies. Let them experiment with building a circuit. Ask questions as they work to make sure they understand that the circuit must be a complete circle for the LED to light up.
If they complete a circuit, challenge them to make an even longer circuit. How long can they make it? How many bulbs can they light up?
Ask students: Is there only one kind of circuit? What happens if you add more bulbs, or more pieces of playdough?
Explain today’s objective: they will be investigating the difference between twodifferent kinds of circuits.
Divide students into pairs and hand out the Parallel and Series Circuit Handout. Have them look at the diagrams of the two circuits and predict what they think will happen if they remove a bulb in each of the circuits. Have them record their predictions on their group handout.
Have students pick either a series or parallel circuit to build first. Tell them to build the circuit according to the diagram on the handout. Ask them questions as they build, and make sure both bulbs in the circuit light up.
Note: For the parallel circuit, students will create two pairs of playdough logs, and connect them with either paper clips or pieces of copper wire (a conductive material) See the diagram on the attached handout.
Once students have one circuit complete, have them remove one bulb from the circuit and observe what happens. Record their observations on their handout.
Repeat the experiment with the other type of circuit.
At the end of the activity, discuss the results as a class. What happened when they removed a bulb? Was it the same for both circuits? Why is it not the same? (Removing a bulb from the series circuit breaks the “complete circle” of the circuit. Removing a bulb from the parallel circuit does not break the circle).
Clean Up together!

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S.INQ Invisible Forces Gravity & Circuits

S.INQ Invisible Forces Gravity & Circuits

S.INQ Invisible Forces Gravity & Circuits

Overview