A rocket engine is a reaction engine as the fuel is burnt the thrust created pushes the rocket forward. Newton's 1st law in action; for every reaction there is a equal and opposite reaction.
The two main types of rocket engines are Solid fuel rocket engines and Liquid fuel rocket engines.
Rocket motors carry their own oxygen supply (oxygen is important for combustion), whereas automobile engines do not - they draw their oxygen from the air taken in from outside the vehicle.
Rocket engines are not air breathing engines and hence they can be propelled into space.
because jet engines reqire air to take in in order to work, rocket engines spew matter to privide thrust
Rocket engine
The Saturn V rocket had five rocket engines in its first stage, called the F-1 engines. These engines were responsible for providing the necessary thrust to lift the rocket off the ground and into space.
Model rocket engines are reproductions of rocket engines that are scaled down to a much smaller size than the real thing. They usually don't do anything and are for display purposes.
a rocket
the rocket is accelerating
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A rocket ship takes off by igniting its rocket engines, which produce thrust that propels the ship upward. The force generated by the rocket engines pushes the ship off the ground and into the air, overcoming Earth's gravity. As the rocket ascends, its engines continue to provide thrust to propel it further into space.
The engines for the space shuttle.