| Term | Definition |
| Captain James Cook | English explorer who claimed the east coast of Australia for Britain and discovered several Pacific islands (Hawaii and Easter Islands) |
| Marco Polo | italian traveler who explored Asia in the 13th century and served Kublai Khan (1254-1324) |
| Hannibal | a great general who led his army from carthage to rome, rome defeated him |
| deep-sea diver | a person who swims deep down into the sea |
| William Clark | explorer sent by President Jefferson to explore land west of the Mississippi River that created accurate maps of the region |
| Sacajawea | native american woman who served as a guide an interpreter for the lewis and clark expedition |
| Richard E. Byrd | had the first successful flight over the North Pole |