It was fun to see David Wiley on The Tonight Show this evening doing some nice variations on the classic sulfur hexafluoride (SF6) demo. This is the inert gas that is six times heavier than the air we breath. If you breath in helium (six times lighter than the air we breath), the pitch of your voice goes up. However, if you breath sulfur hexafluoride (six time heavier than normal air), your voice sounds low. You’ll find a complete explanation of the sulfur hexafluoride demo or anti-helium experiment as some call it in my experiment library.

 

 Steve Spangler Demonstrating the Anti-Helium SF6 Demo: Play Now | Play in Popup | Download

For the Tonight Show, David filled an open top plastic box with the gas and proceeded to float aluminum foil boats and bubbles on this very dense gas. These demos got a nice reaction from the audience. Instead of inhaling the SF6 gas from a balloon, David had Jay Leno dip his head down into the box and inhale some of the gas. As you might imagine, Jay had fun with his “Barry White” voice.

After showing the heavy gas demo on 9News last year, Scott Merrick from Snacks4thebrain visited our lab in Englewood, Colorado to tape this video of the sulfur hexafluoride experiment for YouTube.

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Not exactly… but this stuff is really cool. It’s probably best described as a self-siphoning gel. The chemical is called polyethylene oxide or Polyox and it has an incredibly large molecular weight - about 4 million. When the powder is mixed with water (that’s the tricky part), the liquid becomes very thick and will literally siphon itself from one container to another. As a kid I order a product called Moon Blob - “The Gravity Defying Gel” - which promised to do the same thing. It did… but now I’m doing it as an adult! It’s tough to explain it… just watch the Polyox video.

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As I was driving home this evening, I received a call from a fellow science teacher who shared the news of the passing of Don Herbert. As I reflect on the impact Mr. Wizard had on science education and me personally, I can’t help but be thankful for his dedication and contagious enthusiasm for learning science. It’s difficult to find a science teacher who doesn’t have a favorite Mr. Wizard story. A recently retired teacher loved to tell the story of how Mr. Wizard taught him how to cook a hot dog by literally electrocuting the hot dog using a lamp cord and 120 volts of electricity. I remember watching Mr. Wizard’s World on Nickelodeon in the mid 1980’s and being impressed by the simplicity of the experiments but also the way Don made you want to conduct the experiments at home. Don Herbert made a career out of making science fun.

During the late 1990’s, I was fortunate enough to get to work with Don on several projects, and I took the opportunity to ask for his advice as I started my television career. Don challenged me to do everything in my power to make science accessible to everyone. He reminded me to “be yourself… and don’t let those television producers put you in a white lab coat… just be yourself.” Don always preferred a casual sweater to a lab coat in his later years.

Don received an honorary doctorate from Sacred Heart University in Connecticut and I was invited to share a few science demos during his ceremony. While waiting to go on backstage, Don shared these thoughts on science education… “People call me a science teacher or a scientist, but I’m actually a science entertainer. I think of myself as a person who likes science and has the ability to communicate my enthusiasm about science over the airwaves. I really enjoy being a cheerleader of sorts for science… but I wouldn’t call myself a science teacher. That’s a job I have to leave to the pros.”

In place of their nightly bedtime story, I pulled my first edition copy of Mr. Wizard’s Supermarket Science from the shelves this evening for my boys and shared a few stories about one of the special people who inspired me to be a teacher.

Please click on comments to share your thoughts and memories about Don Herbert.

Visit the official Mr. Wizard website for more information.

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If you’ve ever enjoyed wearing a bottle of Diet Coke after dropping in a roll of Mentos, you know that the reaction is immediate. I’ve always thought that it would be cool if you could slow everything down and really look at the reaction. I shared the idea with our friends at Mentos and they shot this slow motion video. There are a few frames where you can see the carbon dioxide gas coming out of solution being attracted to the tiny pits (nucleation sites) on the surface of the mint. For the tech-nerds in the audience, a Phantom 9.0 high-speed digital camera from Vision Research (2,000 frames per second) captured the slow-motion footage.

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