Gakology

[|Dancing Ooblek]

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Introduction Gak/Oobleck/Slime is not just a fun activity; it can be the foundation of some sophisticated learning about solids, liquids, gases, and things that appear to have the characteristics of one or more of these states of matter.

Gakology and Superheroes

= How to Make a Super Bouncy Ball = By Susan Landis-Steward , eHow Contributor updated February 04, 2011


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Super Balls are known for their bouncing ability.

Those with fond memories of the Super Ball -- the little ball that bounced remarkably high -- can recapture that little childhood joy by making a similar ball at __[|home] __ . Making a super bouncy ball is easy with common household materials available at the grocery store -- you may even already have them at home.

Difficulty: Moderately Easy

Things You'll Need

 *  2 small bowls
 *  Measuring spoons
 *  Borax
 *  Food coloring (optional)
 *  School glue (Elmer's or other clear glue)
 *  Timer that measures seconds (your microwave timer would work great)
 * <span style="font-family: inherit; font-family: inherit; font-size: 13px; font-size: 13px; vertical-align: baseline; vertical-align: baseline;"> Cornstarch
 * <span style="font-family: inherit; font-family: inherit; font-size: 13px; font-size: 13px; vertical-align: baseline; vertical-align: baseline;"> Spoon
 * <span class="stepNumber" style="color: #83afb4; font-family: serif; font-size: 30px; vertical-align: baseline;">1 Dissolve 1/2 tsp. borax in 2 tbsp. warm water. If you want a colored ball, add a few drops of food coloring.
 * <span class="stepNumber" style="color: #83afb4; font-family: serif; font-size: 30px; vertical-align: baseline;">2 Add 1/2 tsp. of the borax mixture and 1 tbsp. cornstarch to 1 tbsp. glue in the other bowl. Set the timer for 15 seconds. Do not mix until the timer goes off.
 * <span class="stepNumber" style="color: #83afb4; font-family: serif; font-size: 30px; vertical-align: baseline;">3 Stir the mixture until combined and then start rolling the mixture in your hands until it becomes solid and forms a ball.
 * <span class="stepNumber" style="color: #83afb4; font-family: serif; font-size: 30px; vertical-align: baseline;">4 Bounce and enjoy. Store the ball in a sealed container when not using it.

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Tips & Warnings
Keep the two bowls separate until you are ready to combine the ingredients.

Although the ingredients are mostly nontoxic, do not eat them.

Wash your hands and all tools after making the ball.

Supervise children while doing this project.

Keep the small ball away from young children, it may pose a choking hazard.

Read more: <span style="color: #003399; font-family: inherit; font-size: 13px; text-decoration: none; vertical-align: baseline;">[|How to Make a Super Bouncy Ball | eHow.com] [|http://www.ehow.com/how_4869961_make-super-bouncy-ball.html#ixzz1WRUALUa9]

We didn't just have fun; we made a polymer: http://www.stevespanglerscience.com/experiment/00000039

Here's a good recipe:

http://www.makingfriends.com/r_flubber.htm

Gak is a non-Newtonian fluid. Here is the power point we used in class to explain these concepts:

Here is a link to a video of people walking on a non-Newtonian fluid (cornstarch and water) http://www.youtube.com/watch?v=f2XQ97XHjVw