| A | B |
| Global Exploration | exploring unknown regions of the world |
| Currents | moving streams of water |
| Winds | movements of air |
| Empire | a group of territories or nations under a single ruler or government |
| Line of Demarcation | an imaginary line running down the middle of the Atlantic from the North Pole to the South Pole |
| Circumnavigation | circling of the globe |
| Conquistadors | Spanish conquerors |
| Navigate | to set a ship’s course |
| Compass | a magnetized needle used to determine direction |
| Astrolabe | instrument used to determine latitude |
| Latitude | distance, in degrees, north and south of the Equator |
| Cartographers | map makers |
| Rudder | a flat, moveable piece at the rear of the ship that makes it easier to steer |
| Caravel | Portuguese designed ship that was fast and easy to maneuver in the water |
| Gunpowder | a mixture of chemicals that explode when lit |
| Colony | outposts or settlements ruled by the homeland |