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Critical thinking skills are very important in the era of the industrial revolution 4.0, especially in the 21st century. This research is a preliminary study that aims to determine the extent of students' understanding of critical thinking skills and their application in learning science and physics by teachers in schools. The research method used is qualitative research using google forms and interviews. The research subjects were students of SMP Negeri 59 Palembang. From the results of this initial study, it was found that 50% of students did not carry out activities to solve problems, 47% of students got unsatisfactory learning outcomes, 60% of students had difficulties in explaining learning experiences, and 51% of students had difficulties in understanding physics science material. Thus, students' understanding of critical thinking skills still needs to be improved in learning science physics. As for suggestions for further research to directly analyze Physics Science learning in critical thinking skills.

critical thinking skills, industrial revolution era 4.0