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Copper Electroplating - The Sci Guys: Science at Home

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The Sci Guys: Science at Home - Comparing Surface Tension Experiment - Penny Surface Tension

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  • Equipment/Ingredients
  • Steps
Welcome to science at home episode seven, season three. In this episode we compare the surface tension of multiple liquids by dripping drops of a liquid on a pennies surface. Surface tension can vary a lot between liquids and the bigger the droplet grows before it bursts, the stronger a liquids surface tension is. By the end of this video you will be able to describe what surface tension is, how it helps to create a dome of liquid and why the droplets eventually burst.
  • Water
  • Honey
  • Corn Syrup
  • Maple Syrup
  • Olive Oil
  • Vegetable Oil
  • Lamp Oil
  • Cream
  • Dish Soap
  • Rubbing Alcohol
  • Food Colouring
  • Eye Dropper
  • Pennies
  • Small Bowl
  • Gloves
  • Lab Coat or Apron
  • Goggles
  1. Place your penny on a flat stable surface
  2. Pour some of the first liquid you want to test into a small bowl
  3. Fill the eye dropper with the first liquid
  4. Slowly drop one drop at a time of the first liquid onto the surface of the penny
  5. Count how many drops are placed on the pennies surface and continue to add drops until the dome of liquid on the penny bursts
  6. Wash the penny, bowl and any surface the liquid touched
  7. Repeat all steps for each liquid making sure to make note of how many drops each liquids dome held before it burst.

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