What is a circuit? Patricia Grant June 20, 2012

Objectives Model the flow of electrons in a circuit Build an actual electric circuit Draw diagrams of electric circuits Explain how to tell when the path of an electric circuit is complete Test the conductivity of a variety of materials

Standards Organize data to support judgments about the advantages of series and parallel circuits (S4.A.2.1.4) Use scientific thinking processes to conduct investigations and build explanations by observation, communication, comparing and organizing (S4.A.2.1.4)

Abstract The students will be learning how to create circuits. They will be building their own circuits and determine which items are poor and good conductors. They will also be drawing a diagram of the model. The student will explain why a circuit is complete. Students will be assessed by observation and quiz. They will also be given an exit slip to complete at the end of the lesson.

Electricity needs these to flow A power supply (battery) A closed circuit

Diagram of complete circuit

The circuit has: Battery Wires Light bulb Switch

Open vs. Closed Circuit

Key facts A light bulb that is part of a complete circuit will light up. Examples of circuits: lamp, fan, toaster, flashlight Parallel circuits are circuits in which electrical current from the battery flows with equal voltage into two or more bulbs. Series circuits are circuits in which electrical current from the battery flows through one bulb and then through another bulb. Conductors conduct electrical current very easily because of their free electrons. Examples: copper, aluminum, gold, and silver. Insulators oppose electrical current and make poor conductors. Examples: glass, air, plastic, rubber, and wood.

Quiz time Click forward to proceed Click previous to go back to the key facts Record your answers on the sheet of paper provided

Will a light blub that is part of a circuit light up? Yes No

Name two types of circuit

Name examples of conductors

Name two example of poor conductors

What is a parallel circuit?

What is series circuit?

Check your answers!

Interactive Demo Click to try to complete your own circuitcircuit Students can practice using the interactive circuit and try different ways to put a circuit together.

Media I will be using audio for the interactive lesson. I will provide caption as needed. Section 508 Larger material Larger font Power point as well as paper form for student to follow Headphones for hearing impaired

Resources jpg jpg /Vp_Sf91ff_k/s1600/closed+switch.JPG /Vp_Sf91ff_k/s1600/closed+switch.JPG