| A | B |
|---|
| unicellular | a living thing that has only one cell. |
| unique | there is nothing else like it; it is special |
| universe | consists of everything that exists, including stars and planets. |
| bicentennial | is the two-hundredth anniversary of an event |
| biped | is an animal that walks on two feet |
| trilogy | is a set of three books, plays, films, or stories that are related in subject or theme |
| triple | something that is three times as many; made up of three parts |
| trivial | something that is not important |
| bilingual | is a person who speaks two language |
| triathlon | is a long-distance race with three parts: running, swimming, and bicycling |
| geode | a globe-shaped hollow stone having a cavity lined with inward-growing crystals. |
| geography | the science that deals with the surface of the earth and its physical features,climates, vegetation, and population distribution |
| geology | the study of the earth, including its origin, structure, composition, and history |
| geometry | the branch of mathematics that deals with the properties of figures in space |
| geothermal | relating to the earth's internal heat |
