Distribution of geoscience contents in Textbooks, in the Natural Sciences Area, in Elementary School I, used in the Natal Municipal School, in the quadrennium 2019-2022
Basic education; BNCC; Sediments; Clay.
In elementary school, the contents of geosciences are distributed in the disciplines of science and geography. The normative documents of the Brazilian basic education establish that the contents of the Textbooks must be complemented, in local and regional scale, in order to contemplate the diversities and particularities of the students' universe. An aspect of this research sought to understand the distribution of geoscience contents within the thematic units proposed by the Common National Curriculum Base, in the science and geography textbooks adopted in the Elementary School I by the 60 schools of the Natal municipal network, for the 2019-2022 quadrennium. To quantify these contents, a counting methodology is described using ¼ page increments. The results obtained in the article of chapter I, with the study being restricted to science manuals, show that the contents of geosciences are significantly present in this schooling cycle, distributed in all the manuals analyzed and in all thematic units, with space and need to deepen the themes at local / regional level. Another aspect of the research seeks to investigate the clay fraction composition of the Extremoz Lagoon and Doce River sediments, as the fluvial and lake systems are the aquatic environments most likely to be contaminated by anthropic action. The Extremoz Lagoon and the Doce River, located in Extremoz Municipality, north of Natal City, receive a special look for being a hydric complex that, in its ecosystem importance, also covers the supply of 70% of the population of the North Zone of Natal. The sediments of the water bodies of this area have been studied for over a decade, but no study specifically addresses the clay fraction of these sediments. This fraction stands out for its larger surface area and consequently greater capacity to retain contaminants. Thus, this work seeks to study the clay fraction of these sediments, investigating their chemical composition, their temporal variation based on rainfall, their ability to retain contaminants, as well as evidence of components resulting from anthropic action.