A rocket consists of a tube of rocket fuel, sealed at one end, with a choke at the other end. The burning fuel produces exhaust gases, which, when forced out of the choke, produce thrust, propelling the rocket in the other direction. At the top of its flight, most rockets burst to display a variety of effects to rival many shells.
A rocket is not a projected but a powered one. Not only will it not describe a parabola, but a wind will catch the stick causing the climb to become flattered and, unlike the rest of the display the rocket will ascend into, not with the wind. Once the motor is spent the remains of the rocket will then descend with the wind, returning to the ground, sometimes exactly, at the firing point.
Solid fuel rockets can be one of two types – end-burning, where the fuel is solidly packed into the tube, so the fuel can only burn at one end – and core-burning, where there is a central core longitudinally through the fuel, so the fuel can burn down its full length. At the top of the rocket can be a smoke composition, so it is possible to determine the maximum height (“apogee”) of the rocket, or a burst charge and stars.