Water drop races are a quick science project that demonstrates the concept of surface tension. An alternative to the penny drop experiment.
Pepper & surface tension : Fizzics Education
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How to Measure Surface Tension - Clear Solutions USA
56 Water and Ice Science ideas science for kids, science, fun
Surface Tension with Toothpicks
Water Drop Races - Science World
After all of this excitement about the snow, there's still
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Penny Lab
Surface Tension Experiment: Water Drop Races
Measuring Surface Tension of Water with a Penny
97 Straws - Toddler & Preschooler Activities ideas
Measuring the Surface Tension of Water
Simple Science Experiments: Fun with Surface Tension - MetroFamily