| A | B |
|---|
| Fluid | anything that flows; air, water |
| Viscosity | a liquid’s “thickness” or resistance to flow |
| Displace | the pushing of fluid away that occurs when buoyant objects take up space in a fluid |
| Buoyancy | the tendency to float. Ie. Boats float in water, balloon in air |
| Force | a push or pull; measured in newtons (N). |
| Buoyant force | upward force exerted by a fluid; (N) |
| Density | the amount of mass in a certain volume of substance |
| Hydrometer | a device that uses buoyancy to directly measure density |
| Archimedes’ Principle | the buoyant force on an object in a fluid is equal to the weight of the fluid displaced by the object. |
| Pressure | measures the amount of force applied to a certain area. ; measured in kPa (kilopascals). |
| Confined fluids | fluids in a completely enclosed container |
| Compressible | when force is exerted the volume shrinks. Ex. Gases |
| Incompressible | volume of the fluid doesn’t decrease when pressure is applied. |
| Barometer | instrument that measures air pressure |
| Mercury barometer | contains liquid mercury – height of the column of mercury indicates the amount of pressure being exerted. |
| Aneroid barometer | barometer used in homes that does not contain liquid. |
| Manometer | measures pressure of other gases; u-shaped, partially filled with fluid |
| Hydraulic systems | the movement of a liquid or the force of a liquid in a closed system causes mechanisms to work. Ie. Brake system in cars. |
| Valves | device that regulates the flow of a fluid. |
| Pump | a device that is used to move fluids |
