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WHY?
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- As air is warmed, the particles (molecules) it is made up of spread out. This
makes the air lighter (less dense), and it rises. As the air in the bag is warmed it
expands and rises. The rising warm air fills the bag and causes it to rise, also.
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ASSESSMENT: Can the student communicate
what they observed?
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The student is able to communicate that the hair dryer warmed the air inside
the bag making the air lighter. The lighter air rose and filled the bag causing it
to rise, also.
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The student is able to communicate that the warm air caused the bag to rise.
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The student is able to communicate that the hair dryer made the bag rise.
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The student is able to communicate that the bag rose.
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Last modified: Sun Aug 10 18:00:59 PDT 1997
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