The aim of this study is to apply a worksheet about the concepts of physical and chemical change and evaluate its results. Case study research methodology was used in this study. The sample consists of total 94 junior students from two classes of Primary Science Education Department in Fatih Faculty of Education at Karadeniz Technical University. This study was implemented in General Chemistry Laboratory-II as a routine course period with two hours for each class in 2008-2009 Spring Term. A worksheet with five phased about physical and chemical change of matter was developed and delivered to each student in the groups. After finishing the activity, the students' worksheets were collected and analyzed. (C) 2010 Elsevier Ltd. All rights reserved.