| A | B |
| apprentice | trainee |
| capital | start up money for a business |
| guilds | craft or merchant associations |
| charter | given to merchants from lords or Kings, these set up town rules |
| usury | lending money and charging interest |
| bubonic plague | killed 25 million people in 1300s |
| commercial revolution | introduced bills of exchange, capital, insurance, and money |
| agricultural revolution | led to higher population due to iron plows, harnesses for horses and windmills |
| Charlemagne | made the Holy Roman Emperor in the early Middle Ages |
| Catholic Church | replaced the power of the Roman Empire, once the Roman Empire collapsed |
| Gothic | type of architecture used in cathedrals and castles, with pointed arches and flying buttresses |
| Christian scholars | challenged by science because they had to resolve conflict between faith and reason |