Science

__** States of Matter: Oobleck Activity **__

The class had great fun recreating the "oobleck" from Dr. Seuss's "Bartholomew and the Oobleck." After reading the story, the students considered the book's descriptions of the substance and predicted whether it was a solid, liquid, or gas. One student predicted that it was a combination of a solid AND a liquid. In fact, oobleck is a [|non-Newtonian fluid] but, given our definitions, it best conforms to the properties of a liquid. That is, it flows (slowly) and takes the shape of its container.



=__Oobleck__= //In a large bowl, mix together: // 2 cups glue 1 ½ cups warm water

//In a small bowl, dissolve: // 2 ½ Tbsp Borax in 1 cup hot water //Add Borax solution to glue solution. // //Stir mixture with a wooden spoon, then knead with hands, until all liquid is absorbed and Oobleck is smooth. //

__** Matter: "Oil and Water Don't Mix" **__



Look closely.

Can you see that the oil is floating on top of the water?

Floating on top of the water (but below the oil) is a rubber band.

Why does the rubber band sink below the oil but NOT below the water?

Ask your student if he or she remembers the follow-up activity with the balance and the measuring cups containing exactly one cup of oil and one cup of water. What liquid was heavier when placed on the balance?

__** Mixtures **__

__** U.S. Customary Measurements **__