| A | B |
|---|
| Fluids | Any material that can flow and that takes the shape of its container |
| Pressure | The amount of force exerted on a given area |
| Pascal | The SI unit 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 point in an enclosed fluid is transmitted equally to all parts that fluids |
| Buoyant force | The upward force that fluids exert on all matter; buoyant force opposes gravitional force |
| 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 (such as a wing) caused by differences in pressure above and below the object; lift opposes the downward pull of gravity |
| Thrust | The forward force produced by an airplane's engines; thrust opposes drag |
| Drag | The force that opposes or restricts motion in a fluid; drag opposes thrust |
