ElectricityWhat do we know about electricity?

YTT

• Yesterday we successfully lit 1 light bulb using wires, batteries, and light bulbs.

• Today we will be able to explain the components of an electrical circuit that form a complete loop.We will be able to predict materials that will be electrical conductors or insulators.

• Tomorrow we will investigate whether materials in our classroom conduct electricity.

Today’s learning objectives

– Be able to explain the components of an electrical circuit that form a complete loop.

– Be able to predict materials that will be electrical conductors or insulators.

Checkpoint for understanding:

– In yesterday’s activity what was the source of energy?

– In yesterday’s activity what was the desired object?

Battery

Light bulb

Minute paper- Where have we been?

Think:

• On an index card, draw how to light a light bulb using the least amount of batteries, bulbs, and wires. (Work individually)

• What is still confusing?

Battery

Light bulb, fan, TV, etc…

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WireWire

Notes:

• Current electricity explains how chemical energy moves from the source to the desired object.

• Define the following Vocabulary Words:– Current – Closed circuit– Open circuit– Conductor– Insulator

© Electricity and Magnetism: Current Electricity. Colgren Communications (2004).

Battery

Light bulb, fan, TV, etc…

-+

Circuits in series form a complete electrical loop from the negative end of the battery, to the source, and back to the positive end, using wires.

Wire Wire

Notes:

Test your self (individual)

• Which of the following diagrams form a complete loop and are a circuit in series?

– See next slides

Will this set-up form a complete loop and is a circuit in series?

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-

Battery

Light Bulb

Will this set-up form a complete loop and is a circuit in series?

+

-

X

Will this set-up form a complete loop and is a circuit in series?

+

-

Will this set-up form a complete loop and is a circuit in series?

+

-

X

Will this set-up form a complete loop and is a circuit in series?

+

-

X

Will this set-up form a complete loop and is a circuit in series?

+

-

Will this set-up form a complete loop and is a circuit in series?

+

-

X

Will this set-up form a complete loop and is a circuit in series?

+

-

X

Complete loop: Analogy

• Legs turning the petals on a bicycle= battery

• Back bicycle tire=light bulb

• Chain=Wire that forms a complete loop

Think-Pair-Share

• Think- individually think of 2 or more examples of conductors and insulators from the video.

• Pair- with the person sitting next to you, generate a list of the conductors and insulators you each remember from the video.

– Discuss whether each item has been correctly labeled a conductor or insulator

Share

• Share- As a class generate a list of conductors and insulators from the video.

Series Circuits vs. Parallel Circuits

Watch the following video clip and explain what the difference is between a series circuit and a parallel circuit.

©Getting to Know: Electricity. 100% Educational Videos(1998).

Homework

Students will need to give an example of a series circuit and a parallel circuit from their home environment.