No abstract

This research explored: (a) the representations and conceptions of some Greek pupils of the concept of chemical reaction, and (6) the ways in which these pupils categorized a set of physical and chemical transformations of matter.The results show that pupils group physical and chemical phenomena in different ways, using different criteria. The analysis shows that the concept of chemical reaction appears in two different meanings, according to the categorization criteria used by pupils.

No abstract

No abstract

No abstract