Analizing the comprehension of the concepts in the unit "Particular structure of the matter"

In this research, it is studied that how well basic topics and concepts in 6th grade unit ?Particular Structure of the Matter is understood in primary school 6, 7, 8th grades. A comparison is done between grades and reasons of the differences between grades are researched as well. The study is carried out on chosen 6, 7, 8th grade students in 4 public and 2 private schools in Çankaya Ankara. 499 students participated in the study. A test with 10 open-ended questions was given to participants and their scores were calculated by evaluation categories. First, scores were compared in each question by grade levels, then participants were compared by different aspects such as their school types, parents? education levels and genders to find out if they affect the scores or not. The model of this study is causal-comparative. At the end of the study, it is observed that when the grades increase, scores decrease non-significantly. It is pointed out that the participants? school types have no effect on their score. However taking special courses, gender and parents education levels are factors separately affecting the scores of the unit mentioned before.