Our experiment: making Oobleck. All you need is water and a box of cornstarch. Warning: do not dispose of cornstarch experiments down your sink; they could clog your drain. Wrap them up and throw them away.
Question: What happens if I mix cornstarch in water?
Hypothesis: If I make it thick enough, it will probably be gluey.
Experiment: Start with 1/2 cup water and 3/4 to 1 cup cornstarch. Pour the water into a bowl, and then add the cornstarch. Stir well.
Observe and record:
- What does it feel like?
- Can it stretch? Bounce?
- Can it pour?
- Is it solid?
- What happens if you pour it onto a cookie sheet and hit it with a hammer?
- What happens if you put it into the refrigerator?
- What happens if you add more cornstarch? More water?
- What if you divide it in half and leave one part out in the air and another part inside a ziplock bag?
- How long does it last?
- Does it get moldy?
Share Results: Scientists write articles. You could take a photo of your oobleck and write a brief note about it and give it to a friend.
You can find more things to do with oobleck here. Find out more about non-Newtonian fluids here.