| Term | Definition |
| density formula | d= m/v |
| density definition | the amount of matter in a given amount of space |
| mass | the amount of matter in an object |
| volume | the amount of space an object takes up |
| volume of rectangle formula | length x width x height |
| pressure | amount of force exerted per unit of area |
| pressure formula | P = F / A (Force divided by Area) |
| atmospheric pressure | Force placed on an object by air particles. |
| buoyant force | The upward force on an object by the fluid that surrounds the object. |
| Archimedes' principle | The buoyant force on an object is equal to the weight of the fluid that the object displaces. |
| fluid | materials that flow |
| weight | the force of gravity on an objects mass |