The purpose of this research was to investigate the primary education second level students' motivations towards science learning in terms of various factors. Within the research, the variation of the total motivational scores in science learning according to the gender, class, socio-economic levels, success in science-technology course and variables of science-technology scores were investigated. The sample of the research was composed of 413 second level students of public primary schools in the city center of Ankara and Adana who were selected randomly. The "Motivational Learning Environment" and the "Personal Information Form" were used as data collection tools throughout the study as survey models. As a consequence of the research, it was confirmed that there was a meaningful difference between the scores that the students got from the REAL version & IDEAL version of the scale and this difference was in favor of the scores that were gained from the "IDEAL" version. Moreover, students' total motivational scores in science learning (REAL version & IDEAL version) displayed a meaningful difference in favor of the female students. It was also observed that students' total motivational scores in science learning exposed a significant difference according to the class level and this difference was in favor of the 6th and 7th grade students. On the other hand, students' total motivational scores in science learning (REAL version & IDEAL version) revealed a significant difference according to the socio-economic factors. Another result was that, students' total motivational scores in science learning (REAL version & IDEAL version) were in favor of the students who were successful in science-technology whose course scores varied between "85-100".