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Changing the Density of a Liquid: Adding Salt
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Learners see that a carrot slice sinks in fresh water and floats in saltwater.
Float Your Boat
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In this physics activity, learners will explore buoyancy.
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.
Design a Submarine
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Learners act as engineers and design mini submarines that move in the water like real submarines.
Build a Raft
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In this activity, learners explore density and buoyancy as they design and construct rafts.
Make a Salt Volcano (Lava Lite)
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This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring.
Weather Stations: Winds
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In this activity, learners use a toaster to generate wind and compare the appliance's heat source to Jupiter's own hot interior. Learners discover that convection drives wind on Jupiter and on Earth.
Sink or Float
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In this activity, learners will make predictions and experiment with different objects to see if they sink or float.