Electricity What do we know about electricity?
Jan 21, 2016
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…
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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?
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X
Will this set-up form a complete loop and is a circuit in series?
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-
Will this set-up form a complete loop and is a circuit in series?
+
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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.