reaction

Changing How We Look at Changing

I love it when teachers ask questions! I alway enjoy a good science question because they make me really think about the subject to be sure I give the right answer, but when a teacher asks a question, I feel obligated to give an answer (if I can) that will let them explain the subject to their students. Recently, I have been talking with a teacher friend, about chemical and physical changes, and the more we talked, the more I thought the rest of you might find this useful.

Black and White Smoke

Sorry this week's experiment is late.  I got caught up in answering a question from MSNBC's Countdown program.  It turned out to be interesting enough for me to put the planned experiment for this week back in the file and write a new one.

Polymers and Slime

Polymers are fascinating molecules that are made up of long chains of smaller molecules. You can imagine them as long strings of beads or strands of spaghetti. For this activity, we will use a process called cross-linking to tangle up the polymers in white glue to change its properties, and make some "slime" for us to play with.

Bendable Bones

With the Thanksgiving holiday just around the corner, I thought it would be fun to do an experiment with a turkey. I have read that Ben Franklin used live turkeys in several of his electrical experiments, I won't go that far. Instead, I thought we would revive an old but "classic" experiment that you can try with the leftover bones.

Pages