The purpose of the current study was to determine the science and classroom teachers’ ethical sensitivities towards the issues of technology and the environment. Thus, the current study was conducted on 239 science and classroom teachers. The study employed the mixed method, in which qualitative and quantitative methods are used together. The quantitative dimension of the study is comprised of a survey, which was developed by the researchers. The qualitative dimension of the study comprised of three scenarios created by the researchers. Two of these scenarios are related to the environment and the other one is related to biotechnology. As a result of the study, the teachers’ ethical sensitivities towards technology and environmental issues were found to be high. For some items in the questionnaire significant differences in gender-based, branch-based, and professional experience were found. The results obtained from the scenarios revealed that while science teachers adapt more realistic approaches to the events, the classroom teachers make decisions for the future. It would be useful to organize in-service training and ethical awareness training for teachers who are in the beginning of their professional lives.