| A | B |
|---|
| chron | time |
| chronic | happens over and over again |
| chronicle | story in the textbook, history in order |
| chronological | in order, beginning, middle and end |
| chronometer | the watch that tells time perfectly |
| synchronize | things that happen at the same time |
| antibiotic | medicine that helps us get better |
| biodegradable | slowly breaks down into soil |
| biography | a story about a person's life |
| biohazard | a dangerous environmental problem |
| biology | study of science, plants and animals. |
