A experimentação no ensino de química do 9º ano: uma relação entre a teoria e o experimento

Abstract

This research was performed along with the students from middle school II, 9th year, in a private school located in the city of Jataí, GO. For its development a class of 40 students was accompanied, which was organized in eight groups, for the intended action considered apprenticeship through experimentation in the teaching of Sciences. The elaborated and applied classes in a total of 10 classes consisted of 05 expositive classes and 05 practical classes. The taught subject was Chemical Transformation, through chemical reactivity, relating concepts as simple substances, composed substances, factors that evidence a chemical reaction, homogeneous and heterogeneous mixture, classification of reactions, among others, were applied in a total of five experiments with alternate materials. The evaluation of the learning was made though surveys answered by the students after the expositive (theoretical) and experimental classes. The results show the importance in the relationship between the theory-experiment, in the apprenticeship of the students. The applications of the experiments contributed for the exercise of the observation, data analysis, conclusion and application of the concepts of chemical transformation in a daily basis. Finally, we designed an instructional material for teachers of the 9th year aiming to help Chemistry teachers in the classroom work and contribute for the improvement in the understanding and learning of the content proposed by the field.