| A | B |
|---|
| fluid | any substance that can flow, such as water and air |
| pressure | fluids apply force to an area |
| buoyant force | upward force acting on an object which opposes gravity |
| airfoil | curved upper surface and a relatively flat-bottom surface |
| lift | difference between the pressure on the airfoil's upper and lower surfaces resulting in upward force |
| thrust | force that pushes the plane forward |
| drag | a slowing opposing force that slows forward motion of an aircraft |
| pressure is measured in | newtons per square meter(N/m squared) or pascals(Pa) |
| fluid pressure exists here in the environment | everywhere |
| Archimedes | Greek mathematician that observed the relationship between the buoyant force and the fluid displaced by an object more than 2,000 years ago |
| ozone | shields the earth against harmful ultraviolet radiation |
| help people predict weather | changes in the surface pressure |
