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Watch surface tension in action.

Materials You'll Need:

Questions and Things to Notice

Learn about the surface tension and polar molecules in this easy pepper experiment, using only a handful of household materials.


  1. The Pepper Experiment Step 1

    Step 1

    Fill the bowl about halfway with water.

  2. The Pepper Experiment Step 2

    Step 2

    Shake some pepper onto the surface of the water, so that the water's surface is mostly covered.

  3. The Pepper Experiment Step 3

    Step 3

    Dip one of your fingers into the water. Did anything happen?

  4. The Pepper Experiment Step 4

    Step 4

    Now, put a small drop of dish soap on your finger and try again. What happened this time?

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Materials Checklist