| A | B |
|---|
| What are fluids? | any substances that flow, such as water and air |
| When fluids apply a force to an area, it is called what? | pressure |
| What is pressure measured in? | newtons per square meter(N/m squared) or pascals(Pa) |
| Where does fluid pressure exist? | everywhere |
| What is the downward force on an object in a fluid? | force of gravity |
| What is the force of gravity equal to? | the object's weight |
| What is the force that pushes up on an object in a fluid? | the buoyant force |
| What is the buoyant force on an object equal to? | the weight of the fluid that is displaced by the object |
| What is the relationship called between the buoyant force on an object and the fluid displacement? | Archimedes' principle |
| What is density? | the amount of matter in a certain volume |
| What does the average density of an object affect? | the object's buoyancy |
| What does Bernoulli's principle state? | the faster a fluid moves, the lower the fluid's pressure is |
| What does an airfoil's shape create? | a low-pressure area above it and a high-pressure area below it-this generates lift |
| What forces are involved in flight? | lift, weight, thrust, drag |
| What is the forward force called? | thrust |
| What is the rearward force called? | drag |
| What do birds and aircraft use to aid in flight? | pressure differences, low body weight, & streamlined shapes |
