Hot Air Balloon
WHY? question_guy
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.
ASSESSMENT: Can the student communicate what they observed?

question_guy
two 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.

two The student is able to communicate that the warm air caused the bag to rise.

two The student is able to communicate that the hair dryer made the bag rise.

two 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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