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What does Corn Starch have to do with Quicksand?
Transcript of What does Corn Starch have to do with Quicksand?
What does Corn Starch have to do with Quicksand? For my MOS project, I decided to test a corn starch and water mixture. I researched the effect corn starch has on water. I learned that the mixture acts like quicksand; when pressure is put on it, it acts like a solid, but when there isn't much pressure, it acts like a liquid. There are actually mollecular strands that get mixed up with pressure that causes the mixture to turn to a solid. When you relieve the pressure, the strands can relax and untangle. This is a picture of the corn starch-water mixture. For my experiment, I decided to test the 'quicksand' and see how it worked. For the first test, I tested the mixture to see if I could make a ball. I mixed 2/3 cups of water and 1 1/2 to 2 cups of corn starch to get a quicksand-like batter. By: Hanan Mohamed Any Questions? I was able to make a ball because I was putting pressure on the mixture. For the second test, I tried to slap and punch the mixture in the bowl. It was very hard! This is what happened when I stopped putting pressure on the ball: For the last test, I used the tips of my fingers to pick up the 'quicksand' as quickly as possible. This was hard as well. Once I picked it up, I let it slip out of my fingers and watched it drip down. It slipped right through my fingers! By doing my project, I learned that corn starch and water act like quicksand. When you put pressure on it, it acts like a solid, but when you don't, it seems like a liquid. When someone gets stuck in quicksand, they squirm and thrash, which only makes them go deeper. To get out, like I demonstrated in my experiment, you should move slowly, not quicklt. Let's just hope nobody here ever gets stuck in quicksand!Full transcript