| A | B |
| Bifocal | divided into two parts that help a person to see things that are nearby and things that are far away |
| Binoculars | 2 telescopes put together |
| Microscope | A device used for producing a much larger view of very small objects, so they can be seen clearly. |
| Microfilm | film on which very small photographs of the printed pages of a newspaper, magazine, etc., are stored |
| Decay | To be slowly destroyed by natural processes. |
| Decide | To make choice about something |
| extraordinary | Very different from what is normal or ordinary |
| extrasensory | outside one's normal sense |
| preamble | an introductory statement; preface; introduction. |
| prefix | A letter or group of letters that is added to the beginning of the word to change its meaning. |
| Root meaning of "Bi" | Means 2 or twice |
| Root meaning of "de" | Means removal or separation |
| Root meaning of "extra" | Means Larger or better than usual |
| Root meaning of "pre" | Means before |