This study examined elementary students' motivational traits in science with respect to students' gender and grade levels. A total of 3685 students from 6th, 7th and 8th grade levels participated in the study. Findings showed that gender and grade level differences exist among elementary students. Concerning the gender difference, girls appeared to be more curious, conscientious, and social with a higher level of need for achievement. Moreover, it was revealed that as grade level increased, students' motivational patterns became less positive.