investigations and experiments

OJ Ice Crystals

This experiment comes from some of my wife's creativity. Our hotel has breakfast every morning, and she has been putting some extra orange juice in our freezer each morning. By evening, it is nicely frozen and ready to be eaten. Besides being delicious, it also offers a great lesson on the science of freezing. To try this, you will need:

Stirring Sand

I ran across the idea for this week's experiment (which is really more of a challenge), while researching another question. The more I thought about it, the more I liked it. It involves the unusual behavior of sand in a glass of water.

Strange Refrigerator Magnets

This experiment is one that I stumbled upon while working on another idea. That seems to happen to me frequently. I was planning to magnetize a needle, and as I was sorting through all the magnets on our refrigerator, I got sidetracked into playing with the rubber magnets (which are really plastic, not rubber). The more I played; the more interesting it got.

Fish in a Bucket

This week's experiment goes back to fishing trips from my childhood. As we caught fish, we put them into a large tub of water. I loved watching them swim around and around. I was told that if you weighed the tub, that it would not register the weight of the fish, unless they touched the sides or bottom of the tub. Was that right? Let's find out.