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Separation Anxiety
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In this activity, learners discover the primary physical properties used to separate pure substances from mixtures.
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.
Plankton Races
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In this two-part activity, learners investigate buoyancy, density and surface area as well as biodiversity and the relationship between the structure and function of organisms.
Klutz-Proof Density Column
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Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.
Float Your Boat
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In this physics activity, learners will explore buoyancy.
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.
Conversation Piece
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Focus sound through a balloon! In this Exploratorium activity, you'll use dry ice to create a balloon that's a sound lens.
Volume, Mass, and Density Boxes
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This activity was designed for blind learners, but all types of learners can utilize it to investigate volume, mass, and density.
As Light as Air
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Learners measure a bottle full of air, and then use a vacuum pump to remove the air. When they re-weigh the bottle, learners find the mass is about 0.8g less.
Bag of Bones
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In this activity, learners will use cereal to conduct an experiment and investigate how decreased bone density is related to increased risk of bone fracture.