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Pie-Pan Convection
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It's difficult to see convection currents in any liquid that's undergoing a temperature change, but in this Exploratorium Science Snack, you can see the currents with the help of food coloring.
Eyedropper Hydrometer: Buoy your understanding of density
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Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.
Inverted Bottles
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In this activity, learners investigate convection by using food coloring and water of different temperatures.