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Key Terms
Bessemer process
A revolutionary method that made _ cheap and abundant, replacing iron in construction and industry.
Electricity
A new energy source that lit up cities, powered factories, and eventually transformed _ life.
Internal Combustion Engine
An engine powered by _ that revolutionized transportation, leading to cars and airplanes.
Mass Production
The manufacturing of goods on an unprecedented _ and scale, exemplified by assembly lines.
Urbanization
The mass movement of people from rural areas to _ in search of work, leading to rapid city growth.
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