| A | B |
|---|
| metric system (SI) | the scientific system of measurement |
| meter | basic unit of length in the metric system |
| light year | the distance light travels in one year |
| liter | the basic unit of volume in the metric system |
| volume | the amount of space an object takes up |
| mass | the amount of matter in an object |
| kilogram | the basic unit of mass in the metric system |
| weight | the measure of the amount of attraction between objects due to gravity |
| newton | the basic unit of weight in the metric system |
| density | the relationship between mass and volume |
