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All Journal Jurnal Pendidikan Indonesia Jurnal Penelitian Fisika dan Terapannya (JUPITER)
Dahliani, Eka
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Education Physics

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Analysis of the Impact of Radiation and Albedo on Variations in Earth's Surface Temperature Nurfaizah, Dwi Ayu; Dahliani, Eka; Widyaputri, Mutya Ardha
Jurnal Penelitian Fisika dan Terapannya (JUPITER) Vol. 7 No. 1 (2025): Jurnal Penelitian Fisika dan Terapannya (JUPITER)
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/jupiter.v7i1.18574

Abstract

Solar radiation reaching the Earth is partially absorbed by the surface and partially reflected back into the atmosphere as shortwave and longwave radiation. This study aims to analyze the impact of radiation and albedo on variations in Earth’s surface temperature. The experimental procedure involved exposing different surface types—soil, water, and rock—to light for 20 minutes and then observing their behavior without light for another 20 minutes. The results indicate that low-albedo surfaces absorb more radiation, leading to a temperature increase of 3°C, from 26°C to 29°C. Medium-albedo surfaces, such as rock, experienced a similar temperature rise of 3°C (from 28°C to 31°C), whereas high-albedo surfaces, such as water, showed only a 1°C increase (from 27°C to 28°C). These findings highlight the significant role of albedo in regulating surface temperature fluctuations. Surfaces in high-albedo areas tend to cool more rapidly than those in low-albedo regions. This demonstrates that albedo directly influences radiation absorption and temperature change, making it an effective instructional example for understanding physical concepts such as heat transfer and energy balance at the Earth’s surface.
Efektivitas Alat Peraga Mini Solar Panel dengan Model Inkuiri Terbimbing pada Topik Energi Terbarukan untuk Meningkatkan Keterampilan Berpikir Kritis Peserta Didik Sarina; Wiyarsi, Antuni; Pertiwi, Andini; J, Jumadi; Dahliani, Eka
Jurnal Pendidikan Indonesia Vol 14 No 2 (2025): June
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpi-undiksha.v14i2.88004

Abstract

Critical thinking skills are essential for students to navigate future challenges and comprehend complex issues. However, many students have not been trained to think critically in the context of science, particularly because the learning process still emphasises theoretical learning over active exploration. This study aims to analyse the effectiveness of using mini solar panel teaching aids in conjunction with a guided inquiry model in improving the critical thinking skills of grade VIII junior high school students. This study was a Pre-Experiment with a one-group pretest-posttest Design. The study population consisted of all grade VIII junior high school students, with a sample of class VIII B comprising 31 students. The results showed that mini solar panel teaching aids, combined with a guided inquiry model, were effective in improving students' critical thinking skills, with an average increase in the N-Gain score of 0.63 in the moderate category. Second, there was a significant difference in the average score of students' critical thinking skills before and after the implementation of the teaching aids, with an average pretest score of 5.56 and a post-test score of 11.16. Third, the implementation of mini solar panel teaching aids using a guided inquiry approach had a significant impact on the development of students' critical thinking skills. This study demonstrates that the use of mini solar panel teaching aids in conjunction with a guided inquiry model can be an effective learning method for enhancing students' critical thinking skills in science learning.
Co-Authors Antuni Wiyarsi J, Jumadi Nurfaizah, Dwi Ayu Pertiwi, Andini Sarina Widyaputri, Mutya Ardha