This simple activity demonstrates
how rockets work. They carry containers filled with
substances that, when ignited, produce gases. These
gases escape through vents in the rear of the rocket.
The gases going backward drive the rocket forward. This
force demonstrates the principle of action and reaction.
You can also try this experiment outdoors using a much
longer piece of string.
Derived from "Finding the Size of
the Sun and the Moon": from Living and Learning in
the Space Age, by Jeff Crelinsten ©1988.
Learn more about NASA
Human Space Flight.
more about Robert
H. Goddard: American Rocket Pioneer.
Learn more about the Saturn V rocket on the Apollo
11 30th Anniversary Web page.