critical thinking

Dirty Words of Science

This experiment is a result of quite a few e-mails that I have received over the years that I have been writing the Experiment of the Week. I hope that it will show some of the communication problems that can occur when scientists and "normal people" talk to each other.

Creeping Carpets

This experiment is one that has been "cooking" in my mind for a while now. Today I had carpets on my mind, since I was cleaning them with our new carpet cleaner. We live at the beach, and our carpets tend to get dirty and sandy, so we place small rugs along the pathway that gets the most use. One problem is that the rugs don't stay there. They slowly migrate across the room. How can this happen? Is the cat doing it to drive us crazy? (She would if she thought it would work!) No, the cat is not involved. The movement is due to the interaction between the carpet and the rugs.

Cooling Fans

This experiment came from Diane in South-central Pennsylvania. She and her son were discussing ceiling fans, and how they make you feel cooler. They wanted to know if the fan actually cools the room, or does it just feel that way?

Cool Water

This experiment comes from washing the dishes. If you look around this site, you will find that a fair number of my experiments have come from washing dishes, which is probably the result of the state my mind is in when my belly is stuffed with yummy food.

Coffee Rings

I have been doing some house cleaning. In cleaning the counters, I noticed a coffee spill that had dried. It had formed a dark ring, with almost no coffee stain in the center. This reminded me of an article that I have read on the science behind coffee rings, giving me the idea for this experiment.

Cartesian Raisins

One of the fun things about thinking up new science experiments is combining two or more old ideas into one new one. This time, we will combine the Dancing Raisins activity with the Cartesian Diver.

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