Ensino por investigação e experimentação: uma proposta de ensino sobre reação química

Abstract

This paper aimed to develop activities with an investigative approach to the teaching of Experimental Chemistry. The learning path was carried out with students from the first grade of high school in a private school in the region of Belo Horizonte. It is important to emphasize that this school applies a Canadian methodology. The experimental activities about chemical reactions were developed using investigative experiments. The theme was chosen because it allowed the establishment of bonds between lived experience and chemical reactions that occur in the students' daily lives, thereby contributing to the consolidation of knowledge, and providing a greater understanding of Chemistry. The experiments were performed based on an everyday situation, in order for the students to interact actively with the proposed activities. Moreover, research was undertaken to consolidate concepts and refine the hypotheses raised. A problem-question was inserted with the objective of complementing the activity. Following the proposed tasks, students responded to a directed study regarding the outcomes. It was noticed great enthusiasm from the students when performing the exercise, given that they were protagonists throughout the development of the didactic sequence. At the end of the course, it was possible to observe that the class, as a whole, had acquired some knowledge regarding oxidation reactions, realizing certain factors that influence the browning of some fruits.