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  Comprehension: A History of Electricity (upper elem/ middle)
Comprehension: A History of Electricity (upper elem/ middle) - large image
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Do you know why it's called a watt? an ohm? a volt? Your students will know after this thorough history. From amber and fur (600 B.C.) to jumping frogs (1786) to electrical resistance (1827), this unit is a fantastic introduction to the history of electricity.
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