Pupils’ (II ‐ 12 year olds) conceptions of combustion |
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| Authors: | Martine Meheut |
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| Institution: | Edith Saltiel and Andr'ee Tiberghien , University of Paris 7 |
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| Abstract: | This study relates to the teaching of combustion in the first year of French secondary education (11‐12 years of age). The area of particular interest was to investigate to what extent a study of combustion makes it possible to introduce concepts relative to chemical reactions. Data were collected before teaching and during teaching sessions by means of written replies to questionnaires, interviews, and tape‐recording of the sessions. Over 400 pupils were questioned. The results show that the observations made by the students lead them to interpretations which are far removed from concepts of a chemical reaction between a combustible and oxygen. The modification of properties of an object during a combustion results from separate transformations of each of the substances composing the object. Permanent nature of some substances is asserted, made good by the conservation of some properties (colour, smell, for example). These results have immediate pedagogical implications and indicate the necessity of redefining the objectives of such teaching. |
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