Ensino Interdisciplinar usando como tema norteador a poluição da água pelo óleo residual de cozinha

Abstract

The interdisciplinary practices focused on the importance of the study of sciences and the construction of scientific knowledge related to technologies and the use of natural resources, when they approach themes that refer to the reality experienced by the students, provide in addition to the scientific knowledge the reflexive and critical thinking of the students to the problems experienced in society, which allowed an environmental awareness and behavior change. Within the themes worked in interdisciplinarity, one of great relevance is water pollution, in issue a problem that can be avoided by students in the home environment is the inappropriate disposal of cooking oil after use. Discards of the oil directly in the sink or garbage of the residences lead to environmental impacts that go beyond direct pollution of the water, consequently the presence of this substance also implies photosynthesis reactions, gas exchanges at the air / water interface and contribute to the death of the aquatic biota. In this way the work has as its objective the elaboration and application of an expositive class, promoting the knowledge based on concepts necessary to explore the studied subject and the students' awareness in relation to the issue of water pollution by the cooking oil post consumer through interdisciplinary class . This was founded by the disciplines of Chemistry, Physics and Biology, with the purpose of interpreting the phenomena generated by the inappropriate disposal of cooking oil. The activity was developed at the Governor Adauto Bezerra School, located in Fortaleza-Ceará, in a class of the third year with 22 students. Before the application of the class, water was collected at the school and at the channel located at Avenida Eduardo Girão, near the school. At the time of collection, the pH, the temperature and then the water refraction index at the Federal University of Ceará were analyzed. Finally, a visual analysis of the oxygen concentration dissolved in the water was carried out by means of the oxidation reaction. The evaluation of the activity was done by the application of 02 questionnaires to verify the knowledge of the students in relation to the concepts and the proposed theme. Through the analyzes carried out together with the students in the classroom, one can identify that the collected samples were within normal as the temperature, pH and refractive index, but the water collected in the channel had a lower concentration of oxygen. In the questionnaires that presented questions related to the discarding of cooking oil, after the class there was a reduction of 59.09% in which they stated that they no longer discard in the sink or household waste, and an increase of 63.63% who reported that they reused it or would trade in the energy tariff. In the questions that showed contents referring to the subjects, a variation in the class average was found, going from 5.6 to 6.5. The results indicated that students after the application of the lesson were more aware about the discard of cooking oil and in relation to the contents, there was an increase of 16.07%, which shows a better assimilation of the contents by the students.