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Go over the material under the Science Concept and Teacher Text in
this lesson with the students. Make sure that each student has at least
a basic understanding of Newton's Third Law of Motion.
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Discuss safety first in the classroom whenever you are conducting a
science experiment. Point out that the class needs to be off to one side
of the room when the balloon jet is released so that no one is hit. As
the teacher decide if you only want to do one balloon demonstration for
the class, or if the students are mature enough to have teams doing their
own balloon jets.
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Proceed with the experiment: Tie a long length of string to a hook
on the wall.
Ask someone to pull the string tight and thread a hollow pen case on to
it. Then blow up a balloon and, holding the neck so that the air does
not escape, tape the balloon to the pen. Then release the balloon and
watch it fly away at immense speed.
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Talk together as a class after the experiment, discussing how
Newton's Third Law of Motion applies to the Balloon Jet.
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Have each student write a short paper on the experiment and Newton's
Third Law of Motion and share with the rest of the class.
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