Abstract :
This study aims to profile critical thinking ability, and creative at science-xi high school biologi class nine weeks later as understanding doctrine 2020/2021. This research was a descriptive study, the method used in this study is the suryei method, data collection carried out using the problem, the obseryation sheet and the documentation, a sample of 108 students in this study, taken from xi science class, a problem released of 14 question xi science class 9 new year 2020/2021 judging by the critical ability of thinking ability, averages ata percentage 75,0% in the category less in creative ability, were acquired, on average, with a percentage of 71,5% less in the category. From the results of this research it could be conculeded that the sophomyst science class 9 Pekanbaru of the 2020/2021 has critical ad creative thinking ability category less.