Copyright © 2020, Biosphere: Tadris Journal of Biology, Print ISSN: 2086-5945, Online ISSN: 2580-4960 BIOSFER: Jurnal Tadris Biologi Vol. 11 No. 2 (2020) 121-128 Contents lists available at BIOSFER BIOSFER: JURNAL TADRIS BIOLOGI p-ISSN: 2086-5945 (print), e-ISSN: 2580-4960 (online), DOI 10.24042 /biosphere http://ejournal.radenintan.ac.id/index.php/biosfer/index An Analysis of Critical Thinking Skills; Global Warming Learning Materials Nur Eka Kusuma Hindrasti 1* ; Nurul Asikin 2 ; Wika Khairinnisa 3 1, 2, 3 Biology Education FKIP UMRAH Riau, Indonesia ARTICLE INFO ABSTRACT Article History Received : 01-02-2020 Accepted : 28-08-2020 Published : 27-12-2020 Keywords: Critical Thinking Skills; Global warming; Science Learning *Correspondence Address: Khairinnisawika@gmail.com This study aimed to analyze students' critical thinking skills levels on global warming materials. This quantitative descriptive study employed the cluster random sampling technique. The analyzed data were the students' critical thinking skills. Researchers collected the data using critical thinking skills test instruments in the form of description questions and open-ended questionnaires. Furthermore, the data were analyzed using statistical formulas in the form of percentages. Based on the data analysis results, the percentage of students' critical thinking skills score was 65% and was categorized at a moderate level. Therefore, the researchers concluded that students' critical thinking skills on global warming learning materials are moderate. Thus, there needs to be an effort to improve students' critical thinking skills. Analisis Keterampilan Berpikir Kritis Pada Pembelajaran Pemanasan Global Abstrak: Tujuan dari penelitian ini adalah untuk menganalisi tingkatan keterampilan berpikir kritis peserta didik pada materi pemanasan global. Penelitian deskriptif kuantitatif ini menggunakan teknik Cluster Random Sampling. Data dalam penelitian ini adalah keterampilan berpikir kritis siswa. Peneliti mengumpulkan data menggunakan instrumen tes keterampilan berpikir kritis berbentuk soal uraian dan angket terbuka. Selanjutnya data dianalisis menggunakan rumus statistik berupa persentase. Berlandaskan hasil analisis data diperoleh bahwa persentase skor keterampilan berpikir kritis peserta didik yaitu 65% yang dikategorikan pada tingkatan sedang. Sehingga peneliti menyimpulkan bahwa keterampilan berpikir kritis peserta didik pada materi pemanasan global pada tingkatan sedang. Dengan demikian perlu adanya upaya untuk meningkatkan keterampilan berpikir kritis siswa. INTRODUCTION In the modern era full of technology and information, life has become more sophisticated with significant changes (Ameliola & Nugraha, 2013; HASANAH et al., 2019). Development requires a new paradigm to create a better generation who has high competence in controlling