At the end of October, my supervisor asked me to perform a science demo for a group of 8th graders to keep them from choosing to go to a magnet school in the area. Originally I was going to go with the typical Hydrogen balloon explosion or even shooting a T-shirt across the auditorium. But then I came across this video on YouTube. I looked at this and immediately said "I NEED TO DO THIS!!"
So here is the video of my demo.
I used about 1L of Liquid Nitrogen and covered it with 1500 ping pong balls. I found them on Amazon and it cost about $100 with free shipping. I apologize for the shakiness of the video; it was taken by a student on my phone.
Doing this experiment inspired me to raise the bar a little on my demos. A few friends of mine took the cornstarch and water demo to the next level by filling a small swimming pool with the stuff. The video does not contain my friends. I figured if they could do it, so could I. I went to a Restaurant Depot near me and bought 300lbs of cornstarch (yes, 300 POUNDS!).
It turned out my pool was too small and I only used 150lbs, but now I have some for next year!! We added about 10 gallons of water to the pool and, voila!, I turned seniors into Kindergartners.
And let me sophomores truly express themselves
And just let them explore science.