| A | B |
| Metric System | standard measurement system based on the number 10 |
| International System of Units (SI) | used by modern scientists in measurement |
| Mass | measure of the amount of matter in an object |
| Weight | measure of the force of gravity acting on an object |
| Volume | amount of space taken up by an object or substance |
| Meniscus | the curved line of volume in a beaker filled with liquid |
| Meter (m) | base SI unit for length |
| Kilogram (Kg) | the base SI unit for mass |
| Newton (N) | the base SI unit for weight |
| Liter (L) | the base SI unit for volume |
| Density | Measure of how much mass is contained in a given volume (mass divided by volume) |
| Kilo | means one thousand or x 1000 |
| Hecto | means one hundred or x 100 |
| Deka | means ten or x 10 |
| base | means one or x 1 of a base SI unit such as meter, gram, Liter |
| deci | means one tenth or 1/10 |
| centi | means one hundredth or 1/100 |
| milli | means one thousandth or 1/1000 |
| Second (s) | the base SI unit for time |
| Kelvin (K) | the base SI unit for temperature |