摘要:AbstractScientific skills such as making hypotheses, making inferences and stating variables are fundamental skills in scientific investigation. This research aims at investigating the level mastery of these skills among pre-service teachers studying at a university in Malaysia. In this study, a set of questionnaire was distributed to 76 undergraduates studying Science education at the Faculty of Education, Universiti Teknologi Malaysia to survey the level of mastery of these skills. From the sample, 12 students we selected to conduct some science experiments and their reports were analyzed to further understand their mastery of these scientific skills. It was found that the level of mastery of making hypotheses, making inferences and stating variables are moderate among these pre-service science teachers.