Laboratório de ciências para o novo ensino médio: explorando a condutividade elétrica em soluções eletrolíticas

Abstract

The New High School seeks to promote the integration of knowledge through interdisciplinarity between areas of knowledge, based on the school links promoted between the common base subjects and the training itineraries. To awaken students' greater interest in physics classes, an electrolytic electrical conductivity apparatus was developed, which consists of a tool sensitive to electrical conductivity in liquid solutions. The educational product was built by combining the teaching of science through investigation and the methodology of the three pedagogical moments. We understand that the investigative stages can enhance the organization and application of knowledge, aligning with the problematization present in the methodology stages of the three pedagogical moments. The teaching proposal consisted of a sequence of teaching by investigation with the development of experimental practices, of an investigative nature, aimed at the study of electricity and electrical conductivity in electrolytic solutions. To achieve this, low-cost materials and basic knowledge of using electrical products were used. This was prepared based on knowledge of electricity, electrical conductivity and electrolytic solutions, thus promoting interdisciplinary activities between the knowledge of Physics and Chemistry. In this way, experimental kits were constructed by the students themselves based on a problem situation presented and discussed in the classroom. It was applied to second-year classes of New High School. The reports developed during the practices show that this resource is an important tool in the students' learning process, favoring students' understanding of electrical conduction and its applications in everyday life.