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| Autor/in | Johnson, Philip |
|---|---|
| Titel | Children's understanding of substances, part 1: recognizing chemical change. |
| Quelle | In: International journal of science education, 22 (2000) 7, S. 719-737Infoseite zur Zeitschrift |
| Sprache | englisch |
| Dokumenttyp | gedruckt; Zeitschriftenaufsatz |
| ISSN | 0950-0693 |
| Schlagwörter | Vorstellung (Psy); Chemie; Schüler; Aggregatzustand; Schüler; Aggregatzustand; Chemie; Konzept |
| Abstract | Arising from a study which explored the development children's concept of a substance ( ages 11- 14), this two-part paper focuses on the idea of chemical change. Part one considers substance identity and pupils' interaction with the scientific idea of melting and boiling behaviour as a means for identification and the assessment of purity. Evidence is presented which suggests that children do not 'naturally' have a concept of substance identity which allows them to recognize chemical change as a possibility. Instead, their thinking is in terms of the history of samples. The scientific idea of identity led to a confrontation with the idea of chemical change but the pupils were unwilling to accept this phenomenon. The preference was to view the product of a chemical change as a 'mix' of the original substances rather than as a substance in its own right. Implications for teaching are discussed. Part two (in press) goes on to examine the issue of explaining chemical change. |
| Erfasst von | Lehrstuhl Didaktik der Physik, Ludwig-Maximilians-Universität München |
| Update | 2003_(CD) |
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