| A | B |
|---|
| theory | an idea, opinion, or guess |
| anthropologist | a scientist who studies the origins and customs of human beings |
| hypothesis | an idea or opinion used to explain certain facts |
| centerboards | flat boards that can be lowered through the bottom of a sailboat to keep it from tipping |
| christen | to give a name to |
| loran | a navigation device that uses radio signals |
| sextant | instrument that finds a ship's position by measuring an angle between a star and the horizon |
| lagoon | shallow salt water that is protected from the sea by sand dunes |
| uninhabited | having no one living there |
| primitive | simple, like that of earliest times |
