Cosméticos como temática para contextualização de propriedades físico-químicas no ensino de química

Abstract

Cosmetics are products used to improve or change the appearance of the face, skin and hair. With the advancement of technology, through science, cosmetics were transformed, either to follow the beauty standard of the time or to reduce toxicities. In this work, we sought to approach the theme of cosmetics through the contextualization of the physical-chemical properties present in the makeup composition. This study was carried out in a 3rd year high school class at a state school in the city of Bagé, with the main objective of evaluating the application of the theme cosmetics, contextualizing the physical-chemical properties present in the makeup composition. For the development of teaching activities, the structure of the Didactic Sequence was adopted, using the 3 Pedagogical Moments. The methodology used in this research was of a qualitative and descriptive nature and, based on the initial problematization, we sought to collect information on the students' prior knowledge about this topic. In the knowledge organization stage, important concepts related to cosmetics and, mainly, makeup were addressed, with the objective of approaching the physicochemical properties of some substances present in cosmetics. For the application of knowledge stage, the students made an oral presentation discussing the physicochemical properties of some selected compounds, as well as answering a final questionnaire. In this stage, the knowledge acquired by them after the application of the didactic sequence was evaluated. It is considered that the application of the SD obtained the expected result, as the students demonstrated a greater understanding of the theme of cosmetics and physical-chemical properties. The students, during the application of the didactic sequence, became involved in the teaching-learning process, becoming active in their construction of knowledge. Therefore, it is considered that the use of themes that are involved in the student's daily life, such as cosmetics, contributes to the understanding of physical-chemical properties of chemical compounds and collaborates for a meaningful learning in chemistry teaching.