| Term | Definition |
| Matter | Anything that has mass and volume |
| Volume | The amount of space that something occupies |
| Meniscus | The curve at the liquid's surface by which you measure the volume of the liquid |
| Mass | The amount of matter that something is made of. |
| Gravity | A force of attraction between objects that is due to their masses. |
| Weight | A measure of the gravitational force exerted on an object, usually by the Earth. |
| Newton | The SI unit of force (N). |
| Inertia | The tendency of all objects to resist any change in motion. |
| Liquid Displacement | The process used to find the volume of an irregular solid. |