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More science activities can
be found here:
Great for
Science Fair projects!
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While You're Waiting for the Food to Come
by Eric Muller, Illustrated by Eldon Doty
To order or find out more about
this book,
click on the book cover above or on either cover
version.
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Go
to the Do Science Store
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Spray a fine mist by using two straws, a glass of liquid,
and a good set of lungs.
Ingredients:
- Two straws
- Glass of water
The Recipe:
I suggest starting with a glass of water and two straws.
If you work your way up to stickier, smellier or more
colorful liquids such as cola or juice be careful where you
aim.
1) Hold one straw vertically in a glass of water with one
hand. Don't let the end of the straw touch the bottom of the
glass of water (this might block the flow of water).
2) With your other hand, hold a second straw horizontally.
One tip of the horizontal straw should be inserted into your
mouth and the other end should be held adjacent to and form
a 90 degree angle with, the tip of the vertical straw.
3) Now, blow and blow hard!
4)
If your straws are set-up properly, your blowing should
raise the liquid up the vertical straw. When the liquid
reaches the top, it spews out in-line with your direction of
blow.
Food for Thought:
Speed-up air creates lower air pressure!
By blowing through the horizontal straw you created a
low-pressure region at the top of the vertical straw. This
allowed the slightly higher-pressure air that was hanging
around the surface of your drink to push the water down,
into and up the vertical straw. Once the water got high
enough in the straw, the stream of air blowing horizontally
carried it along in a fine mist.
Copyright 1998 Eric
Muller
While You're Waiting for the Food to Come"
Original copyright of While You're
Waiting for the Food to Come 1995 Eric
Muller
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