| A | B |
|---|
| gravity | a force that tends to draw all bodies in the earth's sphere toward the center of the earth |
| center of gravity | the balance point |
| stability | not likely to change position |
| altitude | the height of a thing or reference point |
| clinometer | an instrument used to measure angles of slope or inclination |
| thrust | the forward force produced in reaction to the gases excaping through the nozzle of the rocket engine |
| velocity | speed |
| track | observing the moving path of the rocket |
