Laminated Specimens of Polystyrene Foams for Microscopic Observation of Two-Dimensional Structure

We developed a teaching material for a microscopic observation of two-dimensional structure of polystyrene foams. The specimen is made with a thin slice of polystyrene foam laminated in between polyethylene terephthalate films. Using this teaching material, we practiced a series of learning activities for high school students to study structure and physical properties of polystyrene foams. Based on their learning, we conclude this teaching material is useful for understanding physical properties of foams in relation to everyday life and products at high school science classes.