Electrical Circuits

1. Electrical Circuits Open or Closed – Which allows electricity to flow?

2. Objective: I will use a switch to compare open and closed circuits. I will evaluate conductivity to determine which materials allow electricity to flow. Open Circuit or Closed CircuitWhich allows the electricity to flow? Q.O.D.: Use the battery and Christmas light to show when a circuit is open and when a circuit is closed.

3. Open Circuit or Closed CircuitWhich allows the electricity to flow? With your table group: • Use the post it circles to write all the parts of a circuit and place them in the order they need to be to make a circuit that works to create energy. • Discuss each part and why it is important for the flow of electricity. • Draw your flow map in your journal; placing arrows between each part to show how they are connected.

4. Open Circuit or Closed CircuitWhich allows the electricity to flow? With your table group: • Now make your circuit. Did it work? • Discuss any problems you had and adjust your flow map to match your working circuit. • Add a switch. Does that change the energy flow through your circuit? How do you know?

5. Closed Circuit Flow Map

6. Open Circuit Flow Map

7. Which circuit would work better in a school, series or parallel? Why?

8. . Check Your Understanding 1. Observe the electrical wiring below. Indicate whether the connections are series or parallel connections. Explain each choice. This symbol represents a resistor. Resistors do not allow electricity to flow through easily, and therefore create other energy such as light or heat. This symbol represents the battery or energy source.

9. 2. Two electric circuits are diagrammed below. For each circuit, indicate which two devices are connected in series and which two devices are connected in parallel.