| A | B |
|---|
| Newton's First Law | Objects at rest will stay at rest and objects in motion will stay in motion unless acted upon by an unbalanced force |
| mass | The amount of matter in an object |
| payload | The people equipment, etc. related directly to the flight's objective. |
| intertia | A resistance to a change in motion. |
| Newton's second law | The acceleration of an object is directly related to the force exerted on that object and oppositely related to the mass of that object |
| Newton's third law | For every action, there is always an equal and opposite reaction. |
| Galileo Galilei | Discovered that gravity pulls all objects to earth with the same acceleration regardless of their mass. |
| A rocket in its simplest form | A chamber enclosing gas under pressure |
| nozzle | A bell-shaped opening at the lower end of a rocket through which a stream of hot gases is directed |
| stages | two or more engines stacked on top of one another in order to reach higher altitudes or have a greater payload capacity |
| oxidizer | a chemical containing oxygen compounds that permits rocket fuel to burn both in the atmosphere and in the vacuum of space |
| accelerate | to cause to act or move faster |
| force | anything that changes the state of rest or motion of an object |
| fins | arrow-like wings at the lower end of a rocket that stabilize the rocket in flight |
| unbalanced force | a force that is not countered by another force in the opposite direction |
| nose cone | the cone-shaped front end of a rocket |
