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Ooze: A Cornstarch Colloid *

Difficulty
Time Required Very Short (≤ 1 day)
*Note: This is an abbreviated Project Idea, without notes to start your background research, a specific list of materials, or a procedure for how to do the experiment. You can identify abbreviated Project Ideas by the asterisk at the end of the title. If you want a Project Idea with full instructions, please pick one without an asterisk.

Abstract

In this project you'll make a liquid that will contradict your expectations. Hold it loosely in your hand and it will drip off your fingers, but grab it tightly and it will feel solid. Slap a bowl of it with a spoon, and instead of splattering, it solidifies. Do background research on colloids, and be sure you can explain the following terms: colloid, Newtonian fluid, non-Newtonian fluid, thixotropic. (For instructions on how to make it see the link listed under Exploratorium, 1998, in the Resources section, below.) What happens if you put it on a flat surface? Does ooze leak through a small hole in a piece of paper? Are there other examples of non-Newtownian fluids? What do they have in common? How does "ooze" differ from a solution, such as sugar in water? (Exploratorium, 1998; Gardner, 1999, 30)

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Science Buddies Staff. "Ooze: A Cornstarch Colloid" Science Buddies. Science Buddies, 30 June 2014. Web. 18 Sep. 2014 <http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_p031.shtml>

APA Style

Science Buddies Staff. (2014, June 30). Ooze: A Cornstarch Colloid. Retrieved September 18, 2014 from http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_p031.shtml

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Last edit date: 2014-06-30

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