Effective experiment used to demonstrate how advantageous traits can become prominent in a species over time leading to evolutionary change.
The design of this document is functional for a "class set" of lab sheets, with students writing their lab reports in a science notebook or online, but can also be modified to be a fill-in-the-blank worksheet for those who prefer that route. Since this is a Word Document, you can edit as you see fit. As a teacher, to maximize efficiency, I usually had multiple types of fabrics with patterns so that the students could make a hypothesis based on the fabric at their lab station. You will need an excessive amount of gummy bears so WinCo or large bags from a dollar store may be best regarding purchase. These bears will get stale after a few years.