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June 10, 2014

How to Keep a Tissue Dry in Water

Water Science for Kids

Simple water science for kids - how to keep a tissue dry under water

We are back with another fun water science project for kids!  So far we've made a needle float, explored color theory with ice, learned about surface tension, studied evaporation, put a twist on the classic sink or float game, and today we are demonstrating how to keep a tissue dry in water.  This simple water science experiment is sure to delight kids of all ages.  The best part it, it takes only a few seconds to set up.

How to Keep a Tissue Dry in Water

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  • container
  • water
  • tissue (a napkin or paper towel will also work)
  • cup

Push the tissue deep inside the cup.  Fill a bowl or other container with water.  Have your child press the cup down into the water, keeping it straight.  JZ (6) was shocked to see that the tissue didn't have even a drop of water on it.

I explained how air pushed the water down and away from the cup, so the tissue was surrounded by air instead of getting near water.  I told JZ that he could breathe under water using this same method if he did this trick with a bucket large enough to fit his head.  We will try it next time we go to the pool.

We repeated the experiment, but this time I instructed JZ to tilt the cup while under water.  As you can see in the image above, a bubble of air came out of the cup and was quickly replaced with water.  The image below shows the wet tissue sinking to the bottom of the container.

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Cool water science for kids - keeping a tissue dry under water!

More water science for kids:

What happens to salt water when it evaporates?  Simple water science for kids  Simple color theory science for kids with colored ice - kids will love mixing the ice and seeing the results!  Sink or float with a twist - combining an object that sinks with one that floats to see what happens

1 comment:

  1. Love these hands-on learning opportunities! The best way to explore and learn!


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