Once nitrogen oxides (NOx) are generated in the atmosphere, ozone (O3) is generated by the photochemical reactions of NOx, and then O3 reacts with volatile organic compounds (VOCs) existing in the atmosphere to form aerosol. In this study, we conducted experiments that are necessary to make this process of aerosol generation into experimental observation teaching materials, and we then developed the teaching materials using the results obtained in the experiments. The developed teaching materials consist of “(1) Heat the air with a gas burner whose flame is about 1600 K for 30 seconds to generate nitrogen dioxide (NO2)”, “(2) Irradiate ultraviolet light into the generated NO2 for 24 seconds to generate O3” and “(3) Add 0.2 mL of Limonene, which is one of the VOCs, into the generated O3 to generate aerosol then let students observe aerosol”. The teaching materials developed in this study are easy to use in science classes in junior high and high school because it is easy to prepare and operate. By using these teaching materials in classes in school, it is expected that students will develop an interest in environmental issues and will scientifically understand environmental issues easily.
