Scientific literacy is one of the basic competencies that must be possessed in the XXI century. These competencies include explaining scientific phenomena, designing and evaluating scientific investigations, and interpreting scientific data and facts. These three competency indicators must be embedded in students to help them to solve problems and give the best responding to issues especially science issues, as well as "flat earth theory". The purpose of this study was to describe students' scientific literacy competencies in responding to scientific issues "flat earth theory" and their indications in responding to issues. This research is a description research by questionnaire method and interview. The research subjects were 92 students in several high schools in Malang. The questionnaire results show that 95.65% of students rejected the "flat earth theory". Among those who rejected the theory, 20.97% of respondents did not conduct an investigation to conclude the information of the theory. The interview results of this research indicate that students only relied on initial knowledge or initial information to conclude the issue.