| A | B |
| observing | the process of obtaining information by using the senses |
| inferring | explaining or interpreting an observation |
| measuring | comparing an object or a process to a standered |
| weight | a measure of the gravitational force exerted on an object |
| volume | the amount of apace that an object takes up |
| mass | a measure of the aamount of matter in an object |
| meter | basic unit of length |
| gram | basic unit of mass |
| liter | basic unit of liquid volume |
| milli | .001 |
| hilo | 1000 |
| centi | .01 |
| hecto | 100 |
| Deci | .1 |
| Deka | 10 |