Tag - science experiment

Spangler Unwrapped: Mintastic Episode Airs in September

Tune into Food Network’s Unwrapped to get a peek inside the Spangler Science labs as Steve shares the science behind the Mentos Geyser all of that exploding soda. Back in December, I mentioned that a crew from Unwrapped on the Food Network wanted to get the real scoop on the popular Mentos and soda reaction. The crew spent an entire day grabbing the reaction from every angle and trying to understand how all of those tiny bubbles produce such a huge fountain of soda. The episode is scheduled to air on September 24, 2007. Consult your local listing for time and channel.

Exploding Watermelons

I love Halloween. One of my favorite activities is to “carve” pumpkins using a simple reation inside the fruit. First, you carve the face then carefully replace pieces. After creating a reaction by generating a gas inside and igniting it (ask your local chemistry teacher for the details) the face pieces are blown off with a small explosion.

Halloween is more than 100 days away and I just couldn’t wait. So I initiated the new weather anchor at the local Denver television station by introducing her to carving watermelons. The problem was, we didn’t really carve the watermelon, it exploded. Watch the Video to see how we skipped right over the carving and went straight to exploding.

Hooked on Learning – Jack Spangler’s Magic Trick

Jack is 8 years old and likes to perform (he must get that from his Mom). Three years ago, the owners of Frog Street Press invited Jack to accompany me to their amazing summer conference for teachers called SPLASH. I helped Jack perform his first magic trick in front of a large audience (about 1,200 teachers) and that’s all it took. The Frog Street Press people were kind enough to invite us back this July, and Jack was ready to hit center stage. Jack’s routine is an original twist on a classic magic trick you might have seen performed by another magician using pom-pom balls. The audience in this video consisted of almost 1,700 early childhood educators (primarily pre-K through 2nd grade). Here’s Jack…

Water Flowing Uphill?

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.

Mentos Slow Motion Video

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.