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Iron Ore- The largest iron deposits were discovered in the mid to late 1800’s in the midwest.  Iron ore can be processed (made) into steel, which can be used to build railroads, buildings, bridges, etc.

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Oil- With the discovery of a large oil well in Western Pennsylvania in the late 1850’s, an industry was born in the US.  Drilling for oil also led to the petroleum refining industry.

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Transcontinental Railroad- The first railroad to connect the east and west coasts of the United States. It allowed for much faster and cheaper transportation of people and goods across the country.

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Telephone-Before the telephone, the telegraph was the only way to communicate over long distances.  With the rapidly expanding United States, there was a need for a more effective and cheaper communication device. The telephone was invented by Alexander Graham Bell in 1876.

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Car- The automobile was invented by Henry Ford in 1908.  In order to meet overwhelming demand for the new vehicle, Ford introduced revolutionary new mass-production methods. These methods include the use of standardized, interchangeable parts and the world’s first moving assembly line for cars.