A experimentação investigativa em um enfoque CTS no ensino das funções químicas inorgânicas ácidos e óxidos na temática ambiental

Abstract

Research in Chemistry Teaching have pointed out that the investigative experimental activities can be used for increased student participation in the process of teaching and learning. Thus, this study refers to a work in the academic year 2013, in counter part, in the afternoon, in design mode, which aimed to address the chemistry concepts through a social-scientific theme: acid rain. In this sense, the objective of this study was to assess the contributions of the investigative experiment in a science focus, Technology and Society (STS) for teaching and learning functions of inorganic acids and oxides. The survey was conducted with 25 students of 1st and 2nd year of high school a college of the state of Paraná. The methodological approach used was the qualitative interpretative nature, with participatory observation. To collect the data we used, quizzes, notes in field diary, literature searches, preparation and analysis of conceptual maps, production of videos and photos. The activities were divided into eight educational moments in which we sought to establish the relationship between science and technology and its implications for society by addressing the content inorganic functions, acids and oxides, among others. The main results showed that the use of investigative experimentation in a CTS approach aroused the curiosity and motivation by offering a new dynamic for the Chemistry Teaching, encouraging the active participation of students in the construction of knowledge, such as: planning, raising and testing hypotheses, evaluate the results and propose solutions to the issue investigated. In addition to this check, is quoted as a result of an evolution of the scientific concepts and meanings of Chemistry in relation to previous conceptions of students, contributing to changing attitudes and actions in relation to the environment, which allowed reflections on the social implications of science and technology, culminating in the construction of Comic addressing chemical concepts and demonstrating skills such as communication and decision making.