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All Journal Unnes Science Education Journal Jurnal Pendidikan Fisika dan Keilmuan (JPFK) THABIEA (JOURNAL OF NATURAL SCIENCE TEACHING)
Fariyani, Qisthi
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Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Education Physics

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Pengaruh Lama Pemanasan terhadap Kerapatan dan Indeks Bias Minyak Zaitun Fariyani, Qisthi
Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Vol 5, No 2 (2019)
Publisher : UNIVERISTAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/jpfk.v5i2.4030

Abstract

Penelitian ini bertujuan untuk menguji kualitas minyak zaitun ditinjau dari parameter kerapatan dan indeks bias. Minyak zaitun dipanaskan pada suhu 200oC dengan variasi lama pemanasan. Minyak zaitun kemudian didinginkan pada suhu ruang untuk diuji kerapatan dan indeks biasnya. Pengujian kerapatan dilakukan dengan menimbang massa piknometer kosong dan massa piknometer berisi 50 ml minyak zaitun menggunakan neraca digital. Pengujian indeks bias dilakukan dengan menembakkan sinar laser (  = 630 nm) pada plan parallel berisi minyak zaitun dengan sudut datang tertentu. Sudut bias sinar laser kemudian diukur untuk mendapatkan nilai indeks biasnya. Hasil penelitian menunjukkan terdapat pengaruh lama pemanasan terhadap kerapatan dan indeks bias minyak zaitun. Semakin lama waktu pemanasan, nilai kerapatan dan indeks bias semakin kecil. Koefisien determinasi lama pemanasan terhadap kerapatan sebesar 95,5% dan koefisien determinasi lama pemanasan terhadap indeks bias sebesar 97,9%. Hasil penelitian juga menunjukkan bahwa kerapatan berpengaruh pada indeks bias, dengan koefisien determinasi 99%.
Four-Tier Multiple Choice Test Characterized by Local Wisdom Values for Analyzing Critical Thinking Skills Ni'mah, Zuafatun; Fariyani, Qisthi; Sudarmanto, Agus
THABIEA : JOURNAL OF NATURAL SCIENCE TEACHING Vol 4, No 1 (2021): THABIEA : JOURNAL OF NATURAL SCIENCE TEACHING
Publisher : Institut Agama Islam Negeri Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21043/thabiea.v4i1.8062

Abstract

This study aims to develop a four-tier multiple choice test instrument characterized by the values of local wisdom to describe the characteristics of the instrument, determine the validity and reliability of the instrument, determine the characteristics of items, and analyze the critical thinking skills of class X students on Momentum and Impulse material. This research is Research and Development (R&D) and uses the Borg and Gall development model. The research methods used included interviews, tests, questionnaires, and documentation. The four levels of the four-tier multiple choice test instrument consist of: multiple choice questions, answer confidence level, reason choice, and reason confidence level. Validity testing by the three validators obtained the result that the instrument developed was valid. Reliability testing shows that the developed question instrument is reliable with the acquisition of a value of 0.946. The test questions consist of 14 questions in the medium category and 7 questions in the difficult category. The difference in power index is 0.22 to 0.53 which consists of 11 good enough questions, 6 good questions, and 4 very good questions. Overall results of critical thinking skills of students 11.93% in the very critical category, 5.93% in the critical category, 12.2% in the less critical category type 1A (LC1A), 10.87% in the less critical category type 1B ( LC1B), 8.56% in the less critical category type 2A (LC2A), 9% in the less critical category type 2B (LC2B), and 41.36% in the non-critical category.
FOUR-TIER DIAGNOSTIC TEST TO IDENTIFY MISCONCEPTIONS IN GEOMETRICAL OPTICS Fariyani, Qisthi; Rusilowati, Ani; Sugianto, Sugianto
Unnes Science Education Journal Vol 6 No 3 (2017): December 2017
Publisher : Department of Integrated Science, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang in Collaboration with Perkumpulan Pendidikan IPA Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/usej.v6i3.20396

Abstract

The purpose of this research was to identify student misconceptions in Geometrical Optics. Four-tier multiple choice diagnostic test can be used to identify student misconceptions. The data of this research were obtained by interview, questionnaire, and test. This research used random sampling to 107 X grade students who already got Geometrical Optics materials. The data of this research were analyzed and interpreted to distinguish students who understand the concept, not understand, and misconceptions. The result of the research showed that on each item of the test, there are some students who have misconceptions. Students had misconceptions in the low category with details of 31% of all test item, 53% in the medium category, and 16% in the high category.
Co-Authors Agus Sudarmanto Ani Rusilowati Ni'mah, Zuafatun Sugianto Sugianto