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Browsing by Author "Kutucu, E. Selcan"

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    Pre-Service Chemistry Teachers' Understanding of Ionization and Dissolution
    (Elsevier Science Bv, 2011) Ekiz, Betul; Bektas, Oktay; Tuysuz, Mustafa; Uzuntiryaki, Esen; Kutucu, E. Selcan; Tarkin, Aysegul
    The purpose of this study was to find out pre-service chemistry teachers' explanations and representations regarding ionization and dissolution concepts. Data were collected through open ended questions from seven respondents. Findings indicated that only three participants agreed that solid AgCI partially dissolves in water. Moreover, only two of them drew this process at the microscopic level correctly. Similarly, three respondents accepted that solid NaCI dissolves in water not ionizes. Moreover, only two of them were able to draw this process at the microscopic level correctly. Finally, one participant stated that gaseous HCl ionizes in the water. Also, none of the participants represented this process correctly. (c) 2011 Elsevier Ltd. Open access under CC BY-NC-ND license.
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    Pre-Service Chemistry Teachers' Understanding of Phase Changes and Dissolution at Macroscopic, Symbolic, and Microscopic Levels
    (Elsevier Science Bv, 2011) Tuysuz, Mustafa; Ekiz, Betul; Bektas, Oktay; Uzuntiryaki, Esen; Tarkin, Aysegul; Kutucu, E. Selcan
    The purpose of this study was to investigate how pre-service chemistry teachers use macroscopic, symbolic, and microscopic levels and how they integrate teaching strategies at these three levels while instructing phase changes and dissolution. Also, their opinions on the importance of using these three levels in their instructions were examined. The participants were seven pre-service chemistry teachers. Data were collected using open ended questions. Results indicated that pre-service chemistry teachers generally used demonstration, experimentation, and lecturing at macroscopic level. Although they believed that the use of the three levels promotes meaningful learning, they had some difficulties in integrating these levels with the contents during instruction. (c) 2011 Elsevier Ltd. Open access under CC BY-NC-ND license.