character: Charles Goodyear
topic: Vulcanization Process
grade: 8
subject: Social Studies
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character: Charles Goodyear
topic: Tire Durability
grade: 8
subject: Social Studies
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character: Industrial Revolution
topic: Impact on Transportation
grade: 8
subject: Social Studies
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character: Henry Ford
topic: Mass Production of Automobiles
grade: 8
subject: Social Studies
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