1. Industial Revolution
Electricity, Steel and Oil The three major improvements of the second Industrial Revolution were in the areas of energy and metal. It was based on oil, steel and electricity rather than coal and iron. ... In the 1870s, electricity was used to make the first electric motor, which would quickly replace the steam engine in industry. ... After that, in 1901, the first radio signals were sent across the Atlantic, heralding, to the inventor, a day when wires would not be needed to send signals.From iron to steelAt the same time as electricity was replacing steam, steel was replacing iron. ... The c...
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