One of the general aims of the secondary school physics courses is to ensure that students learn the basic concepts and expressions which are necessary to understand wide application areas of physics in their learning process. However, there is a need for a curriculum which includes these concepts and expressions and their relations among them and textbooks and materials which supports this kind of curriculum for a successful. In this study, senior high school Physics textbook by Ministry of Education which is used in most of the secondary schools in Turkey is analyzed for its scientific content and comprehensibility. According to the evidence, there are deficiencies in its scientific content and wrong relations among concepts and associations in this textbook. Moreover, it is observed that expressions are insufficient in expressing the topics.