| A | B |
|---|
| A.D. | An abbreviation for "the year of the Lord" |
| Archeologist | A person who studies past human life and culture |
| Aviator | A person who flies planes |
| B.C. | An abbreviation for "before Christ" |
| Geographer | A person who studies the earth and its features and the distribution of life on earth |
| Geologist | A person who studies the origin, structure, and history of earth |
| Hieroglyphics | A system of writing in which pictures or symbols are used to represent words or sounds |
| Microgravity | A condition where the apparent weight is less than its true weight on Earth |
| North Pole | The northern end of the earth's axis of rotation |
| South Pole | The southern ends of the earth's axis of rotation |
| Paleontologist | A person who studies fossils |
| Philosopher | A person who studies the nature of things using reasoning |
| Polyniesians | People who inhabited a region of the South Pacific |
