| A | B |
|---|
| Stone Age | began 2 million years ago |
| Stone Age | humans used pebbles as tools |
| Stone Age | pointed stone hunting tools were developed |
| Stone Age | humans learned to harness fire for heating, cooking, and protection |
| Stone Age | population became more productive and people could live in one area |
| Bronze Age | as populations grew, new technology was needed for food and shelter |
| Bronze Age | discovery of copper |
| Bronze Age | people learned to melt copper with other ores to create stronger metal |
| Bronze Age | began around 3,000 B.C. |
| Bronze Age | used copper and copper-based materials for tools because of durability |
| Bronze Age | people developed irrigation systems |
| Bronze Age | humans transformed agriculture and not depend on native vegetation and animal life for survival |
| Bronze Age | people created better ways for storing food and developed writing, navigation, and other basic technologies |
| Iron Age | began around 1,200 B.C. |
| Iron Age | Iron and Steel became the primary materials for tools |
| Iron Age | steel and iron were more plentiful and cheaper than copper |
| Iron Age | more people could afford tools which created more opportunities for technological advancement |
| Iron Age | progress continued even through the Dark Ages (500-1,000 A.D.) |
| Iron Age | the alphabet came into use, as did coins |
| Iron Age | Trade, transportation, and communication improved as civilization expanded |
| Middle Ages | began around 400 A.D. |
| Middle Ages | Germanic tribes invaded and conquered the Roman Empire |
| Middle Ages | tribes continually fought each other for territory |
| Middle Ages | major invention was the Printing Press, developed by Johann Gutenberg in 1445 |
| Middle Ages | books could be produced quickly with less labor, making books less costly and available to more people |
| Middle Ages | the magnetic compass and waterwheel changed the power of water into mechanized energy |
| Middle Ages | adoption and use of paper money increased the amount of goods bought and sold |
| Renaissance | began in the early 1300s in Italy and lasted until 1600 |
| Renaissance | a great time of cultural advancement |
| Renaissance | known for its new ideas in art, literature, history, and political science |
| Renaissance | because of improvements in ships, European voyagers could now travel to America |
| Renaissance | new methods of farming adopted from Native Americans |
| Renaissance | Leonardo da Vinci drew plans for a flying machine and movable bridge |
| Renaissance | inventions included the calculator and telescope |
| Renaissance | the screwdriver is invented by gunsmiths |
| Industrial Revolution | started in England around 1750 and moved to America |
| Industrial Revolution | went from cultivating with horse and plow to the mechanical reaper |
| Industrial Revolution | less people are needed to grow food and people are able to migrate to large cities and towns |
| Industrial Revolution | Era of manufacturing |
| Industrial Revolution | Edmund Cartwright changed weaving from a manual one to a mechanical one |
| Industrial Revolution | Joseph Jacquard furtered weaving by creating a series of punch cards with recorded instructions which would allow the weaver to change patterns |
| Industrial Revolution | James Watt improved the steam engine |
| Industrial Revolution | Eli Whitney, inventor of the Cotton Gin, developed interchangeable parts in machinery |
| Industrial Revolution | scientific knowledge began to be applied to technological knowledge, greatly accelerating technical progress |
| Industrial Revolution | Employees were divided into production workers and managers, each being given a specific task |
| Industrial Revolution | efficiency of production became an area of serious study |
| Industrial Revolution | Frederick Winslow Taylor developed the 4 Principles of Scientific Management |
| Industrial Revolution | dirt and gravel roads became paved highways |
| Industrial Revolution | diesel electric locomotive replaced the steam locomotive |
| Industrial Revolution | motor truck and airplane challenged the railroad |
| Industrial Revolution | telegraph, telephone, radio, and television replaced pony express mail carriers |
| Industrial Revolution | mass-produced dwellings replaced log cabins |
| Industrial Revolution | metal buildings became the factory of choice |
| Industrial Revolution | the 40 hour work week with annual vacation for workers |
| Industrial Revolution | children could stay in school instead of being on the farm and factories |
| Industrial Revolution | universal literacy |
| Information Age | successful companies process material better than their competitors |
| Information Age | wide use of automative machines and information-processing equipment |
| Information Age | high demand for trained technicians, technologists, and engineers |
| Information Age | constant need for job-related training and retraining of production workers |
