Today we did two experiments that were centered around surface tension. The first was Magic Moving Milk! The boys were pretty shocked at the end result. They had no idea what was going to happen.
What you need:
Milk (I used 2%, I have read to use whole, but we don't drink it)
food color
dish soap
shallow dish or plate
Put some milk on the plate or shallow dish. You don't need a lot, just enough to cover the bottom and about 1/2 and inch up the sides. Have the kiddos add one drop at a time of food coloring to their plates.
In the middle of the plate add one to two drops of dish soap and watch it change!
Then I just gave them a popsicle stick and let them move the colors around and swish them until they made their own colors.
Science behind this experiment: Milk is made up of molecules that basically "hold hands" or stick together. These molecules form what is called
surface tension. Things will float on water until the surface tension is broken (dish soap). Soap breaks the surface tension of the milk, thus the colors meld together and move around.
Enjoy,
Crystin
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