morjchem Reading Tools

This study aims at analyzing the experimental demonstration teaching method using video on elementary school students’ science learning outcomes and identifying the principle of sunscreen using various materials against the sun. The principle of sunscreen is taught using photo paper smeared with a light-sensitive liquid. After that, the sunscreen material is dripped on the paper, coated with transparent plastic, exposed to sunlight, and observed for changes. To analyze the physical properties in the morphology of the sunscreen material observations with SEM and XRD. Students’ understanding is assessed through a 20-pretest posttest question supported by a learning video, where the research subjects are 23 elementary school students in Indonesia. The results show that the principle of sunscreen material using ZnO, TiO2, SiO2, Al2O3, and CeO2 can keep the light-sensitive paper from changing color after being exposed to sunlight. There was an increase in students' understanding of the principle of sunscreen material after being given a learning video. This study shows and useful for informing the principle of sunscreen using various materials and students' understanding of it.