The main purpose of this research is to determine the effect of the volume of concept on the level of understanding the relationship between concepts. The mixed method was used in the research. Volume of concept form, concept map form and puzzle scales were used to collect quantitative data. Qualitative data was collected through a fully structured interview form. A homogeneous sample was used in the study. A total of 54 students participated in the study (there are 27 students in both experimental and control groups). The data was analyzed with the help of SPSS and Microsoft Excel program. T-test, Wilcoxon, frequency and percentage techniques were used for descriptive analysis. According to the findings, it was determined that volume of concept had a positive effect on relationship between concepts. No significant relationship was found between the experimental and control groups in regards to concept knowledge. In addition, according to the quantitative findings, concept map was found to be more successful in determining the relationships between concepts. On the other hand, according to the qualitative findings, the volume of concept form and concept map was equally effective in determining the relationship amongst different concepts. In line with the results, volume of concept can be used to determine the relationship between concepts.