The aim of this study is to investigate the end-of-unit evaluation questions in 5th grade primary school science workbook according to dimensions of the Revised Bloom's Taxonomy (RBT). For that purpose, 191 end-of-unit evaluation questions of 5th grade science workbook which is approved by the Republic of Turkey -the Ministry of National Education, the Board of Education and Discipline- were evaluated with document analyses method with considering RBT. During the evaluation, document analysis was performed that is one of the qualitative investigation methods. Classification of the questions were performed via considering previously published studies and the criteria of Anderson et al which is published in 2001, and translated into Turkish in 2010 by Ozcelik et al. The results of the analyses were interpreted with obtaining ratio and frequencies. As a results of this study, we observed that unit evaluation questions of 5th grade science workbook was belonging to low level cognitive domain step of RBT. As a conclusion, we believe that the unit evaluation questions of 5th grade Science Workbook should be equally distributed between low and high level cognitive domain steps of RBT.