To learn meaningfully and to classify in chemistry
In our context, the teaching of chemistry does not make enough emphasis on the chemical criteria of substances classification and the chances that these they for a meaningful learning of several kind of substances based on functional groups and on the differentiation between pure substances and h...
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| Format: | Article |
| Language: | English |
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Universidade Federal do Rio Grande do Sul
2006-12-01
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| Series: | Investigações em Ensino de Ciências |
| Subjects: | |
| Online Access: | http://www.if.ufrgs.br/ienci/artigos/Artigo_ID154/v11_n3_a2006.pdf |
| Summary: | In our context, the teaching of chemistry does not make enough emphasis on the
chemical criteria of substances classification and the chances that these they for a
meaningful learning of several kind of substances based on functional groups and on the
differentiation between pure substances and homogeneous mixtures as well as and among
other chemical and physical modifications. This teaching situation implies a devaluation
of the relevance that meaningful comprehension has on chemical language. In general, the
later comprise the formulation of substances and the formulated representation of
chemical transformations. These formulated representations are a bridge between the
world of substances, their chemical transformations and their conceptualization. The
periodic system of chemical elements as a basic classificatory system for substances
according to their elemental composition is a conceptual tool for meaningful teaching and
learning of substance groups in relation with their common functional groups. This leads
to the development of substances classificatory systems, which allow the students to
interact with the diversity of substances, to work with previous knowledge and concepts
formation processes and to make explicit their knowledge through natural language and
the way they use and signify the language of relative and molecular chemical formulas. |
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| ISSN: | 1518-8795 1518-8795 |