STEEL- Harder and more durable than other kinds of iron, steel wrought changes in manufacturing, agriculture, transportation and architecture.
http://www.open.edu/openlearn/history-the-arts/history/history-science-technology-and-medicine/history-technology/iron-and-steel
OIL-Distilled into oil, petroleum lubricated the machinery of the industrial age.
http://www.history.com/topics/oil-industry
INVENTIONS-America was known around the world as the home of invention in 1892.
http://resources.chuh.org/chhs/library/teacherweb/socialstudies/worldhistory/industrialrevolutinventors.htm