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Bob Widodi
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The Relationship Between Science Process Skills and Students' Creative Thinking Skills on Magnetism in Junior High School Darmaji; Astalini; Dwi Agus Kurniawan; Bob Widodi
Jurnal Pedagogi dan Pembelajaran Vol. 5 No. 3 (2022): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jp2.v5i3.48636

Abstract

Physics lessons are classified as difficult subjects, so students need to do practical work to make it easier for them to understand the material concept. This study aims to analyze the relationship between students' science process skills and junior high school students creative thinking skills in magnetism. The method used in this study is mixed. This study used a sample of 40 people from class VIII SMP. The sampling technique is Simple Random Sampling. The research instruments used in this study were observation sheets, questionnaires, and interview sheets. The data analysis technique used is quantitative and qualitative data analysis techniques. Quantitative data analysis was carried out using descriptive statistical tests and inferential statistics. This research results show that the percentage of students' science process skills in class VIII C is 70% in the good category. While in class VIII F 75% are in a Good category. Moreover, the percentage of students' creative thinking skills in class VIII C is 60% in the good category, while in class VIII F is 55.0% in the good category. This study concludes that there is a significant relationship between students' science process skills and students' creative thinking skills in class VIII SMP magnetism material. This research implies that it is helpful for teachers and prospective teachers to improve students' science processes and creative thinking skills. Moreover, this research can be used by teachers as a guide to evaluating students' science process skills and creative thinking abilities.
Experimental Study: Avocado Seed Powder as Adsorbent for Fe Metal Ions in Water Bob Widodi; Suparno; Wipsar Sunu Brams Dwandaru
JST (Jurnal Sains dan Teknologi) Vol. 14 No. 1 (2025): April
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v14i1.87894

Abstract

Heavy metal waste pollution such as iron (Fe) has affected many clean water sources in Indonesia, so alternative solutions are needed to clean them, one of which uses adsorbents from avocado seeds. This study aims to determine the effect of avocado seed powder mass as an adsorbent on Fe metal levels in water and compare the effectiveness of adsorbents activated with HCl and H₂SO₄ solutions. The research method uses an experimental method which includes making adsorbent powder, activation process using HCl and H₂SO₄ solution of 1M concentration, adsorption process, testing with Atomic Absorption Spectroscopy (AAS), and data analysis through tables and graphs. The results showed that HCl adsorbent reached the highest capacity and effectiveness at a mass of 1 gram with an adsorbed Fe content of 7.83 mg/L and an effectiveness of 78.3%, while H₂SO₄ adsorbent reached the highest capacity at a mass of 5 grams with an adsorbed Fe content of 8.09 mg/L and an effectiveness of 80.9%. On average, H₂SO₄ adsorbent has a higher effectiveness (78.2%) than HCl (75.6%). In conclusion, although the addition of adsorbent mass affects the level of Fe adsorbed, the effect is not always linear, and adsorbents activated with 1M H₂SO₄ proved more effective than those activated with 1M HCl.
Co-Authors Astalini Darmaji Dwi Agus Kurniawan Suparno Wipsar Sunu Brams Dwandaru