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Build a Raft
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In this activity, learners explore density and buoyancy as they design and construct rafts.

Submarine: Lift Bag Lander
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In this activity (on page 4), learners create a submarine using a plastic sandwich bag. This is a fun way to learn about buoyancy and how captured gas can cause objects to float.

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.

Float Your Boat
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In this physics activity, learners will explore buoyancy.

Design a Submarine
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Learners act as engineers and design mini submarines that move in the water like real submarines.

Submarine: Soda Cup Lander
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In this activity (on page 2), learners create a submarine using a plastic cup. This is a fun way to learn about buoyancy and density.