Friday, March 30, 2012 at 6:52AM Can saltwater, water, alcohol, and shampoo be stacked? This is a very simple student inquiry activty (and one of my students' favorites) that can be done in class (download handout).
Sunday, February 26, 2012 at 8:46PM
What happens to hot and cold water when placed in room temperature water? What if the water is colored? Watch the video for a simple demonstration of the properties of hot and cold water.
Tuesday, July 26, 2011 at 9:13AM The densities of different liquids can be easily demonstrated by making a density column. Steve Spangler has a splendid density column demo that I decided to make on a much larger scale. Instead of using a graduated cylinder I decided to use a fluorescent light bulb tube guard. To seal one end of the tube I used duct tape and Goop so that no liquid would leak out. Once the tube is ready, it's just a a simple matter of pouring the liquids into the tube according to their densities. Check out the video for the results and for some additional tips.
Tuesday, April 12, 2011 at 8:21PM I picked up this in a toy shop. Students are fascinated by it and always wonder how it works. Once they learn about density, they figure it out pretty easily.
