Ooze: A Cornstarch Colloid *
AbstractIn 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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Last edit date: 2017-07-28
- Exploratorium, 1998. "Outrageous Ooze," The Exploratorium [accessed January 18, 2006] http://www.exploratorium.edu/science_explorer/ooze.html.
- Gardner, R., 1999. Science Projects About Kitchen Chemistry. Berkeley Heights, NJ: Enslow Publishers.
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