Penny Perfect Properties (Solid-Liquid Interations)

I can get more water to stay on a penny than you can! Collaborative pairs determine the volume of liquids that can be contained on the surface of copper pennies and plastic coins. The pairs analyze their results using graphs and go on to design super surfaces capable of holding the most liquid.

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CCSS: Designed
NGSS: Designed
Instructional Ideas

  • Task can be used at the beginning of a lesson on surface tension
  • Have the class calculate the volume of a drop of liquid based on the number of drops in a given volume
Classroom Considerations

  • Tables need to be level and flat
  • Several beakers and pipettes are required
Pros

  • Experiment is adaptable to use different types of liquids
  • Requires data collection that mimics real-world application
Cons

  • None
NGSS