| A | B |
| navigable | deep and wide enough to allow the passage of ships |
| dry farming | a farming technique that leaves land unplanted every few years in order to gather moisture |
| sirocco | a hot, dry wind from Northern Africa |
| hub | a central point of concentrated activity and influence |
| seismic activity | earthquakes and volcanic eruptions |
| subsidence | a geological phenomenon in which the ground in an area sinks |
| Renaissance | the revival of art, literature, and learning that took place in Europe during the fourteenth, fifteenth, and sixteenth centuries |
| graben | a long, narrow area that has dropped between two faults |
| inhabitable | able to support permanent residents |
| tsunami | a huge wave caused primarily by a disturbance beneath the ocean, such as an earthquake or volcanic eruption |