| A | B |
| graphy | to write or to map |
| geo | earth |
| geography | study of boundaries, people |
| geology | study of earth's structure |
| geometry | study of shapes, lines, planes |
| logy | study of |
| hydro | water |
| phobia | extreme fear |
| astro | stars and planets |
| astrology | study of the Zodiac |
| hydrofoil | boat that travels on top of water |
| hydrophobia | disease where can't swallow |
| archeo | ancient things |
| archeology | the study of ancient things |
| thermo | heat |
| bari | pressure |
| peri | distance around |
| dia | width |
| audio | to hear |
| bio | to live |
| ant (suffix) | one that |
| hydrant | water pipe |
| dehydrate | to remove the water away |
| de | to take away, remove |
| hydroelectric | electric power from a dam |
| chrono | time |
| chronometer | a device to measure perfect time |
| dia | width |
| meter | to measure, distance measurement |
| liter | liquid measurement |
| gram | weight measurement |
| micro | small |
| deci | 1/10 |
| centi | 1/100 |
| milli | 1/1000 |
| deca | 10 |
| hecto | 100 |
| kilo | 1000 |