Science Fair Project: Alum Crystals

crystal-alum1Kids love growing crystals.

The crystal shown in the photo appears to have been grown on a colored yarn string. It is interesting that the yarn seems to wind its way through the crystal.

I also find the size of the crystal interesting. Determining how to grow large alum crystals could be a great science fair project.

I am finding that the easiest way to start a science fair project is to decide on a topic, such as growing crystals. Then find an exploratory experiment, an experiment that gives instructions for growing a crystal. Next, identify all the variables in the experiment, and from these variables, pick one that you want to test.

For an exploratory experiment about growing alum crystals, see