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All Journal Tadris: Jurnal keguruan dan Ilmu Tarbiyah Jurnal Fisika Unand
Husnah, Ilma
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Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Analyzing K-11 Students' Boiling Conceptions with BFT-Test using Rasch Model: A Case Study in the COVID-19 Pandemic Husnah, Ilma; Suhandi, Andi; Samsudin, Achmad
Tadris: Jurnal Keguruan dan Ilmu Tarbiyah Vol 5 No 2 (2020): Tadris: Jurnal Keguruan dan Ilmu Tarbiyah
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/tadris.v5i2.6871

Abstract

During the COVID-19 pandemic, students tend to have limitations that can cause them to experience misconceptions of teachers' concepts in an online setting. This becomes an insufficient basis for students to construct knowledge. Students can properly use one concept in a particular context and experience misconceptions on the same concept but in different contexts. This study aims to determine students' misconceptions about the concept of boiling, the percentage of misconceptions on each indicator of the boiling concept, and the causes of misconceptions in eleventh-grade (K-11) natural science students in one of the state high schools in Bandung Barat Regency. This study involved 92 students as samples in the study. The instrument used to analyze the concept of boiling misconceptions is the instrument was named BFT-Test (Boiling concept Four-tier). The misconceptions analysis of buffer solutions using the BFT-Test instrument showed that misconceptions occurred by 60 %, scientific conceptions by 13 %, and lack of knowledge by 27 %. Most misconceptions occur in analyzing the effects of pressure at the boiling point, which is 65 %. Based on this research results, the teachers are expected in the online learning process during the COVID-19 pandemic to link the material taught with concepts that exist in students' daily lives so that students easily capture the material and students remember the concepts in each given material.
Sintesis Magnesium Oksida dengan Variasi Temperatur Sintering Husnah, Ilma; Astuti, Astuti
Jurnal Fisika Unand Vol 6 No 1 (2017)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.6.1.29-32.2017

Abstract

Telah dilakukan penelitian tentang sintesis magnesium oksida (MgO) menggunakan metode presipitasi. Nanopartikel MgO disintesis dengan memvariasikan temperature sintering yaitu 400 C, 500 C, 600 C, dan 700 C dengan massa PEG-6000 2 g. Struktur kristal, ukuran kristal, morfologi permukaan, dan distribusi diameter partikel dari nanopartikel ini dikarakterisasi menggunakan X-Ray Diffraction (XRD) dan Scanning Electron Microscope (SEM). Dari hasil analisis pola difraksi sinar-X ditunjukkan bahwa struktur kristal MgO berbentuk kubik dan morfologi permukaan MgO berbentuk bulat (spherical). Ukuran kristal semua sampel berkisar antara 27,36 – 45,57 nm dan ukuran partikel semua sampel berkisar antara 30,41 – 95,92 nm. Hasil SEM menunjukkan semakin tinggi temperatur sinteringnya maka morfologi permukaan MgO semakin homogen. Kata kunci: MgO, presipitasi, temperatur sintering, XRD, SEM
Co-Authors A. Suhandi Achmad Samsudin Astuti -