Record your observations:
- Did your plastic piece shrink or grow? By what percentage?
- Is the change in plastic size different for different types of plastic? Do some work better than others?
- If you have a kitchen scale measure the initial and final mass of the plastic - did that change?
- Why do you think the plastic is changing when you put it in the oven?
Still wondering what's going on? Check out our
page for an explanation and a mini-notebook for the activity!