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All Journal Journal of Science and Technology: Alpha Journal of Science and Mathematics Education
Angelina, Nania Nova
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Pola Kristalisasi Garam Dalam Kondisi Lingkungan Ekstrem Azizah, Ainiyatul; Angelina, Nania Nova
Journal of Science and Technology: Alpha Vol. 1 No. 3 (2025): Journal of Science and Technology: Alpha, July 2025
Publisher : Lembaga Publikasi Ilmiah Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/alpha.v1i3.237

Abstract

Salt crystallization is a fundamental process that is greatly influenced by environmental conditions, including temperature, humidity, pressure, and atmospheric composition. This study aims to analyze salt crystallization patterns occurring under extreme environmental conditions, such as high temperatures, very low humidity, as well as hypersaline and low-temperature environments. The methods used include laboratory experiments with simulated extreme environments using a climate control chamber and microscopic analysis of the shape and structure of the resulting salt crystals. The research findings show that extreme environmental conditions significantly affect the morphology and growth rate of salt crystals. Under high temperatures and low humidity, crystals tend to form complex dendritic structures with higher growth rates. Conversely, at low temperatures and high pressure, crystals tend to form cubic shapes with denser structures and slower growth. Hypersaline environments exhibit unique crystallization patterns, including the formation of irregularly shaped crystals and non-homogeneous surface patterns. These findings are important for further understanding of natural geochemical processes in extreme environments such as salt deserts, hypersaline lakes, or extraterrestrial planets like Mars. In addition, the results can be applied to desalination technology and more efficient industrial salt production.
Efektivitas Pembelajaran Berbasis STEM dalam Meningkatkan Kreativitas dan Keterampilan Berpikir Kritis Siswa SMP Negeri 1 Jombang Azizah, Ainiyatul; Angelina, Nania Nova
Journal of Science and Mathematics Education Vol. 1 No. 2 (2025): Journal of Science and Mathematics Education, June 2025
Publisher : Lembaga Publikasi Ilmiah Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/josme.v1i2.169

Abstract

This study aims to examine the effectiveness of STEM-based learning (Science, Technology, Engineering, and Mathematics) in enhancing students' creativity and critical thinking skills at SMP Negeri 1 Jombang. The background of this research is rooted in the low level of student engagement in conventional learning processes, which tend to emphasize memorization rather than the development of higher-order thinking skills. The research method used was a quasi-experimental design with a pretest-posttest control group. The research sample consisted of two classes: an experimental class that implemented STEM-based learning and a control class that used conventional learning methods. Research instruments included a critical thinking test, creativity observation sheets, and student response questionnaires. Data analysis results showed a significant increase in students’ creativity and critical thinking scores in the experimental class compared to the control class. This improvement was confirmed through statistical testing using the t-test and normalized gain, which indicated a high level of effectiveness in the experimental group. Furthermore, the questionnaire results revealed that students responded positively to the STEM-based learning approach, finding it more engaging, challenging, and relevant to real-life contexts. Therefore, it can be concluded that STEM-based learning is effective in improving the creativity and critical thinking skills of junior high school students. These findings recommend the broader implementation of STEM learning models in the context of Indonesian lower secondary education
Co-Authors Azizah, Ainiyatul