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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?
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.
_________ means to push away.
_________ means to pull together.
charge
attract
repel
charge
attract
repel
If an electrically-neutral object GAINS electrons, what charge does it now have?
positive negativ
e
neutral
If an electrically-neutral object LOSES electrons, what charge does it now have?
positive negativ
e
neutral
Static electricity is placed on an object by _____________ such as combing hair or rubbing a balloon with a wool cloth.
currents neutron
s
contact
How did you do?
I did great! I understand static electricity!
I’m getting there, but I’d like some more practice.
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.
You have just completed the “Will it Conduct?” activity on pages 34-35. Let’s briefly review what you learned!
Insulator: a substance through which electricity cannot flow readily
Examples…
wood plasticrubber
sulfur glass
Conductor: a material through which electrons can move easily
Examples…
brass aluminumcopper
graphite water
Are you confident in your understanding of conductors and insulators?
Yes, I’m confident.
No, I’d like more practice.
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.
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.