| A | B |
|---|
| Fluid | A nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid |
| Pressure | The amount of force exerted on a given area. |
| Pascal | Unit of measurement for pressure; equal to the force of one newton exerted over an area of one square meter. |
| Atmospheric pressure | The pressure caused by the weight of the atmosphere. |
| Density | The amount of matter in a given space; mass per unit volume |
| Pascal's principle | The principle that states that a change in pressure at any given point in an enclosed fluid is transmitted evenly to all parts of that fluid. |
| Buoyant force | The upward force that keeps fluids immersed in or floating on a liquid. |
| Archimedes' principle | The principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces. |
| Bernoulli's principle | The principle that states that as the speed of a moving fluid increases, its pressure decreases. |
| Lift | An upward force on an object that moves in a fluid. |
| Thrust | The pushing or pulling force exerted by an aircraft or rocket. |
| Drag | The force parallel to the velocity of the flow. |
| Turbulence | Irregular or unpredictable flow of fluids. |
| Hydraulic | A device that uses Pascal's principle to move or lift objects. |
