Dr. V: Fireworks in Water - Hawaii News Now - KGMB and KHNL

Dr. V: Fireworks in Water

HONOLULU (HawaiiNewsNow)- With the New Year's just around the corner, Dr.V has a safe "water" firework experiment.

Dr. V Show: Fireworks in Water

December 28, 2010

 

Things you need:

  • Tall glass
  • Water
  • Food Coloring
  • Oil

 

The experiment:

Fireworks are amazing to watch, but can be dangerous to handle. We are going to make a different kind of firework! Fill your glass ¾ of the way full with water. Pour some oil on top of the water till you have a thin layer of oil on the water. Then add a few drops of food coloring into the glass. What happens to the food coloring? Wait a while for the ‘fireworks' to begin!

 

How does it work?

Oil and water don't mix and because oil is less dense than water, it floats on top of the water. The food coloring will dissolve in water, because it is water soluble, but not in oil.

So as you put a drop of food coloring into the glass, the food coloring will stay as a drop in the oil, you can actually see a ball of food coloring in the layer of oil. As soon as it hits the water, it begins to diffuse into the water. And because the food coloring is heavier than the water, it falls to the bottom and spreads out like fireworks.

 

Did you know that…

There will be a ban on novelty fireworks starting on January 2, 2011, so this experiment is a safe and fun way to have your own ‘fireworks' display!

 

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