Download - Electricity
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Lessons
• 1 What Gives Matter A Charge?• 2 How Does Electrical Energy Get
Around?• 3 How Do You Make Electricity Do What
You Want?• 4 What’s the Best Pathway for Electrons?
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Lesson 1:What Gives Matter a Charge?
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In the activity “Opposites Attract, Likes Repel” on pages 12-13, you made two observations:
Objects with opposite charges (one negative, one positive) will attract each other.
Objects with like charges (both negative or both positive) will repel each other.
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You also learned that the build-up of electrical charges in one place is called STATIC ELECTRICITY.
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Let’s see what else you remember!
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A particle with a positive charge is called a/an _______________.
protonelectron
neutron
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A particle with a negative charge is called a/an _______________.
protonelectron
neutron
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_________ means to push away.
_________ means to pull together.
charge
attract
repel
charge
attract
repel
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If an electrically-neutral object GAINS electrons, what charge does it now have?
positive negativ
e
neutral
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If an electrically-neutral object LOSES electrons, what charge does it now have?
positive negativ
e
neutral
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Static electricity is placed on an object by _____________ such as combing hair or rubbing a balloon with a wool cloth.
currents neutron
s
contact
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How did you do?
I did great! I understand static electricity!
I’m getting there, but I’d like some more practice.
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Go on to Lesson 2
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Lesson 2:What is the difference
between open and closed circuits?
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Click on a term to reveal its definition.
circuit
open circuit
closed circuit
Proceed to quiz
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Circuit:
A closed-loop path of conduction through which an electric current flows
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Open circuit:
An incomplete path that will not permit an electric current to flow
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Closed circuit:
A complete path for electric current
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Quiz:
What type of circuit is shown in each of the following examples?
Open circuit
Closed circuit
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Open circuit
Closed circuit
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Open circuit
Closed circuit
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Open circuit
Closed circuit
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Open circuit
Closed circuit
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Now that you’re done, do you feel like you understand the difference between open and closed circuits?
Yes, I understand.
No, I’d like more practice.
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Go on to Lesson 3
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Lesson 3:How Do You Make
Electricity Do What You Want?
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You have just completed the “Will it Conduct?” activity on pages 34-35. Let’s briefly review what you learned!
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Click on a term to reveal its definition and examples.
Conductor
Insulator
Continue
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Insulator: a substance through which electricity cannot flow readily
Examples…
wood plasticrubber
sulfur glass
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Conductor: a material through which electrons can move easily
Examples…
brass aluminumcopper
graphite water
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Which of these items are conductors?
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Which of these items are insulators?
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Are you confident in your understanding of conductors and insulators?
Yes, I’m confident.
No, I’d like more practice.
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Go on to Lesson 4
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Lesson 4:What’s the Best
Pathway for Electrons?
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You have learned that there are two main types of circuits:
Parallel
Seriesand
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Parallel circuits are circuits with more than one pathway through which electrons can flow.
Series circuits are circuits with only one pathway through which electrons can flow.
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What type of circuits are shown in the following examples?
parallel
series
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parallel
series
Flashlight
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parallel
series
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parallel
series
Home lighting
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parallel
series
Holiday lights
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parallel
series
Car headlights
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parallel
series
Security systems
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How did you do? Were you certain about your answers?
Yes, I knew them.
No, I’d like more practice.
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If you’d like to read more about electricity, check these out!
Ben and Me: An Astonishing Life of Benjamin Franklin by his good mouse Amos by Robert Lawson. Boston: Little, Brown and Company, 1939.
Blinkers and Buzzers: Building and Experimenting with Electricity and Magnetism by Bernie Zubrowski. New York: Morrow Junior Books, 1991.
Simple Electrical Devices by Martin J. Gutnik. New York: Franklin Watts, 1986.
Superconductivity: From Discovery to Breakthrough by Charlene W. Billings. New York: Dutton, 1991.
Wires and Watts: Understanding and Using Electricity by Irwin Math. New York: Macmillan, 1981.