Tag - science fair projects

Putting Together an Amazing Science Fair Project

Have you signed up for your school’s science fair but haven’t picked a science fair project? Or are you thinking about joining your science fair but don’t know where to start?

Participating in the science fair is an amazing opportunity to learn about the scientific method, ask questions, explore, make new discoveries and gain an understanding of how science works.

The start to a great science fair project is asking questions. Performing an experiment is not a science fair project.

To find a science fair project, browse through the experiment library and start asking questions like “why does it work that way,” “what if I did it this way?”

For example, dropping Mentos into Diet Coke is not a science fair project. It’s a science demonstration. Asking questions like “what temperature of Diet Coke will make the tallest geyser,” or “what soda makes the shortest geyser?” are good science fair projects.

A Hoosier Win at the Science Fair!

Brandt Callahan and Jackson Bartlett, who go to Parkview Intermediate School in Bedford, Indiana, took the Experiment of the Week and won FIRST PRIZE in the third grade division of the Science Fair!

In fact, Brandt and Jackson added a little OOMPH to the experiment by using several different kinds of cereal instead of just one, and using a blender instead of a baggie and their hands. The boys admit that most of the cereals they used just didn’t seem to have any iron in them, in spite of what their labels claimed.

Next time, they’re going to use Life cereal, because they want to SEE the little black dots of iron! They’ve also decided that there definitely won’t be any raisins involved – the ICK factor was just too high with raisins.

Brandt and Jackson are in the third grade, and they learned about this experiment from their teacher. Jackson had won First Prize in first grade, and

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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.

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.