Update the diagram you previously drew on the board to include a switch using the Simple Circuit with Switch diagram provided.Ĥ. Elicit answers from students that help them make connections between the closed circuit they just built, and the earlier demonstration with the classroom light that creates an open and closed circuit. Ask: What would happen if a switch were added to this circuit? Provide each group with a single knife switch and have them update their circuit. Walk the class through building the circuit using the How to Build a Simple Circuit handout.Īfter groups have successfully lit the bulb, have them make a labeled sketch of the circuit they built in their notebooks. Draw a simple circuit diagram on the board, and label and explain all of the parts, using the provided diagram. Explain that you will demonstrate how to build a circuit and they will follow along, but later on they will need to work in their groups to build a circuit on their own. Explain that their group goal is to work together to build a simple circuit that will light the bulb. Separate the class into working groups of 2-4 students and distribute the parts listed above to each group.
Show the class the separate pieces they will use: a D cell battery the holder for the D cell battery four alligator clip leads a 2.5 volt, 0.2 amp, or smaller bulbs with a screw-type base and two bulb holders. Tell the class they will now build a closed simple circuit to light a bulb. Students build a simple circuit to light a bulb with the help of a diagram and demonstration. Tell students the circuit is now closed and electricity is free to travel and illuminate the bulb.ģ. Reference the shapes previously drawn on the board. Tell students when the light goes off, the circuit is open and electricity cannot reach the bulb to produce light. Do a quick demonstration using the room’s lights. Ask: Is this shape open or closed? (It is open.) Inform students that in order for electricity to flow and power a device, there must be an unbroken, or closed, pathway.
Ask: Is the shape open or closed? (It is closed.) Now draw a circular shape that is not complete, like a “u,” on the board. Ask: Do you know how electricity travels to power these devices? (Electricity travels through circuits.) Ask: How is electricity used in more complicated projects, like powering a robot? Explain that electricity is used to provide power to various parts of the robot, such as moving mechanical parts, systems that provide control for the robot (like the CPU), and data-gathering components (like sensors).ĭraw a circle on the board.
Encourage them to identify objects in the room that use electricity. Activate students’ prior knowledge about electricity.įind out what students already know about electricity.
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