This study aims to enrich a theme in the science course in the distance education process with augmented reality-based applications and to examine the effects of these applications on students' achievement and attitudes in science courses. A single group pretest and posttest experimental design was used in this research. The research group consisted of 15 third grade students attending at a school in Siirt during the 2020-2021 academic year. In the research, AR-based applications were designed for some gains aimed at the "Electric Vehicles" theme in the science course and these applications were shown to the students through the Zoom program. This applications consist of 15 h, including pre and post test. Research data were collected through data sets obtained from success and attitude scales given before and after the application. The findings obtained from the research show that the students' achievement and attitudes towards the science course increased significantly with Augmented Reality (AR) based applications.