Liquid?, Solid? Gooey Slime.
To make your own slime, follow these instructions:
(1) Pour a cup of cornstarch into a bowl.
(2) Slowly add 1/2 cup of water, just a little at a time, mixing with your fingers as you go. To give your mixture real slime appeal, add a few drops of food coloring.
Now, pick up the ooze in your hand and squeeze it.
Record your observations below.
|Squeeze the ooze.
|Shape it into a ball.
|After shaping the ooze into a ball, open your hand.
|Gently bang on it with a spoon.
|Place a tiny object like a paper clip on top of it.
|As you pour ooze into another container, try and cut it with a pair of scissors.
You have just made what is known as a "non-Newtonian" fluid. In the 1700s, Sir Isaac Newton described the properties of ideal fluids. He said an ideal fluid would have a constant viscosity, or resistance to flow, at a given temperature. Your experiments proved that your ooze is a non-Newtonian fluid because it has the properties of both a liquid and a solid and reacts to stress with increased viscosity.
Quicksand is another non-Newtonian fluid. That means the more you struggle against it — or try to "cut" through it — the more resistant it gets, which explains why you shouldn't struggle violently if you happen to fall into it! (While we're on the subject, the best thing to do if you fall into quicksand is to swim out slowly.)