| A | B |
|---|
| Name | Definition |
| density | the amount of mass per unit volume of a material |
| rectangular solid | a six-sided block in which all sides are rectangles |
| volume | the amount of space taken up by an object |
| fluids | materials that can flow and have no definite shape |
| pressure | force per unit of area applied on the surface of an object |
| atmospheric pressure | the force exerted per unit area by air particles |
| buoyant force | the upward force on an object in a fluid exerted by the surrounding fluid |
| Archimedes’ principle | the buoyant force on an object is equal to the weight of the fluid the object displaces |
| force | a push or a pull tending to change the motion of an object or produce motion in a stationery object |
| hydrometer | an instrument that measures the density of a liquid |
| gravity | an attractive force between all objects that have mass |
