Your putty will get a little dirty, so just use a small part of it. It bounces, but it also shatters! You may want to do this part outside so you don’t make a mess. Roll your putty into a ball and drop it on the counter or floor-it will bounce like a rubber ball!Ģ. If you just stick a piece of ice onto the putty, you’ll see the cold color “glow” through the ice cube.ġ. Then use something cold, like ice or compressed air, to “draw” on your warm putty. Some Thinking Putty is thermo-chromatic, meaning that it changes color with changes in temperature! Just playing with the putty in your hands will warm it up enough to change colors, but you can also use a hairdryer to change its color in quick, dramatic fashion. If you use enough force, it will tear into two pieces cleanly, instead of stretching. Pinch the putty at an edge and then quickly tear it across, just like you would tear a piece of paper. Because it’s a Non-Newtonian substance, though, Thinking Putty will act like a solid if you apply enough force. This makes it hard to break off a piece it just keeps stretching out. You’ve seen how putty stretches out when you pull it gently. Experiment with ways to get even bigger air bubbles trapped to make more noise.Ģ. When its all folded up, squeeze it to hear it pop! When you stretched and folded, you trapped air bubbles in the putty. Keep folding until you can’t fold any more. Fold it over once, then again the opposite way. Stretch your putty out into a thin sheet. While you’re at it, you can make a little noise.ġ. One of the most fun things to do with putty is just to stretch, twist, squish, and mold it into shapes. (But then you can pick up the pieces and stretch and smash them like putty again!) When you apply the ultimate force-hitting it with a hammer-it acts exactly like a solid and shatters as though it were ceramic. If you push your finger in gently it will sink deep into the putty, but if you jab it hard your finger will bounce right off. If you pull it gently, it will stretch if you pull it forcefully, it will tear. Unlike most liquids, however, Thinking Putty changes its behavior based on the amount of force applied. Like a liquid, it won’t hold its shape, although because of its high viscosity, it moves very slowly. (Honey, for example, has a much higher viscosity than water.) Thinking Putty, while sometimes having properties of a high-viscosity liquid, also has certain properties of a solid. Viscosity is the “thickness” of a liquid, or its resistance to flow.
Putty is a Non-Newtonian substance, which means that it doesn’t follow the theory of viscosity that Newton observed.
Even if you don’t have some, you can see it in action with our Thinking Putty video:
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