The document defines key terms from Chapter 12 including: 1) The Industrial Revolution which was a long, slow process that changed how goods were made through inventions like the Spinning Jenny and the establishment of factory systems. 2) Young women, called Lowell Girls, who worked in the Lowell Mills in Massachusetts during the Industrial Revolution. 3) Urbanization, the process of populations shifting from farms to cities. 4) Important transportation developments like the National Road, the Erie Canal, and Henry Clay's American System which promoted internal improvements to roads, bridges and canals.