| A | B |
|---|
| Metric System or SI | Used in all labs and hospitals world-wide. |
| U.S. Customary System | Used in homes and businesses mainly in the United States |
| System | A general plan with many things working together to do a job. |
| Unit | A section of something (a measuring tool or a textbook or in the army!) |
| Standard | Familiar and never changes size. |
| Liter | A unit for VOLUME (metric) |
| Gallon | A unit for VOLUME (U.S. Customary) |
| mL, dL, kL, cL, etc | Units for VOLUME (metric) |
| pint, qt, tsp, cup, etc | Units for VOLUME (U.S. Customary) |
| Meter | A unit for DISTANCE (metric) |
| Yard | A unit for DISTANCE (U.S. Customary) |
| mm, cm, dm, km, etc | Units for DISTANCE (metric) |
| in, ft, mile | Units for DISTANCE (U.S. Customary) |
| Newton | A unit for WEIGHT (metric) |
| A spring is useful because... | This tool can measure WEIGHT. |
| A balance is useful because... | This instrument can measure MASS. |
| Pound | A unit for WEIGHT (U.S. Customary) |
| Sections (units) on a thermometer | Degrees (either C or F or K) |
| Degrees Celcius | Units of TEMPERATURE (metric) |
| Degrees Fahrenheit | Units of TEMPERATURE (U.S. Customary) |
| Gram | Unit of MASS (metric) |
| VOLUME | The 3-D SIZE of an object. |
| MASS | How much MATTER it's made of. |
| WEIGHT | How much GRAVITY pulls down on an object. |
| DENSITY | How compact an object is. (Mass per Volume) |
