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How Can Gravity Make Something Go Up?
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In this activity, learners use cheap, thin plastic garbage bags to quickly build a solar hot air balloon. In doing so, learners will explore why hot air rises.
Over the Hill
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In this physics activity, learners construct a small-scale version of a classic carnival game.
Convection Demonstration
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In this quick activity (located on page 2 of the PDF under GPS: Balloon Fiesta Activity), learners will see the effects of convection and understand what makes hot air balloons rise.
Inverted Bottles
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In this activity, learners investigate convection by using food coloring and water of different temperatures.