Diffusion Lab- Classroom Response

         In the Diffusion Lab, we learned that Iodine is an indicator for starch, and that an indicator is a substance that changes color in the presence of the substance it indicates. After our group did the procedure, our observation was that the substance of the starch and water was supposed to change color because the iodine came into contact with the starch and the water; this is called "diluted". Sadly, the starch did not change color. We believe it's because of the material of the plastic-zip-lock bag we were using. But then again, as long as we were able to learn from our mistakes, it's fine; especially because even scientists make mistakes and end up finding something else that works for it.