JURNAL PEMBELAJARAN FISIKA
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ANALISIS MEDAN MAGNET ELF TERHADAP NILAI pH IKAN DALAM PROSES PENGAWETAN IKAN BANDENG (Chanos chanos)
Get PDFAbstract The ELF (Extremely Low Frequency) magnetic field is a spectrum of electromagneticwaves that located at frequencies less than 300 Hz and classified as non ionizingradiation. The ELF magnetic field is utilized in many case, one of them in the case offood, it is because the magnetic field can be applied to inactivate pathogenicmicroorganisms that cause food easily damaged or rotten. One of the factors in food thatcan be a reference related to microbial growth is pH (Hydrogen potential). This studyaims to determine the effect of ELF magnetic field exposure in the preservation of milkfishto the pH value. This study involved 21 samples of fresh milkfish, with the selection ofcontrol and experiment class. The experimental sample was exposed to an ELF magneticfield with an intensity of 730.56 μT and 877.37 μT with exposure time of 2 x 30 and 2 x45 minutes. pH measurement using pH meter. The result of this research is ELF magneticfield exposure affects the pH value of milkfish, which can inhibit the increment of pHvalue. The effective dose in inhibiting pH value is ELF magnetic field exposure with730.56 μT during 2 x 30 minutes. Keywords: Magnetic Field Extremely Low Frequency (ELF), Preservation, Milkfis
IDENTIFIKASI KETERAMPILAN PROSES SAINS SISWA SMK PADA POKOK BAHASAN RANGKAIAN ARUS SEDERHANA
Get PDFScience process skills is a capability which purpose is to develop and apply students' knowledge in solving problems so that students are trained and able to understand a concept scientifically. This article aims was to identify students science process skills conducted through tests on the subject of simple current circuits. This study was conducted with 18 students as respondents. The instrument used is 2 problems with each question consisting of 4 points. The results showed that with a percentage of 54.24%. Of the 6 indicators contained in the skills of the science process, the average percentage of the highest indicator is on the plan indicator to test the hypothesis with a percentage of 72.56% and the lowest indicator is the result of experiments with a percentage of 39.77%. The results indicate that students are not accustomed to experimenting in the learning process at school.Kata kunci : Identifikasi, Keterampilan proses sains, Rangkaian arus sederhan
PENGEMBANGAN MODUL BERBASIS SAINTIFIK UNTUK MELATIH KEMAMPUAN BERPIKIR KRITIS PADA MATERI GERAK HARMONIS DI SMAN BALUNG
Get PDFAbstractThis research was a development research to produce a development productin the form of scientific based module to train critical thinking ability. 4D was used tobe the development model consisting of 4 stages, but in this research only on untilthird stage that defined, design, and develop. Instrument used in this research wasvalidation sheet, student response questionnaire, and critical thinking ability test.Based on the results of expert validation analysis found that the validity criterion of88.19%, which was at the validity level was very valid and the result of user validationanalysis was known that the validity criteria obtained is 100% and the validity levelwas very valid. The result of pretest and posttest analysis showed that the average NGain score is 0.53 which was in the medium category. Then for the student responseof scientific-based module got a positive response of 88.68%. So the scientific-basedmodule had very practical criteria used in learning.Key word: scientific, validation, student respon, critical thinking
IDENTIFIKASI MISKONSEPSI SISWA MENGGUNAKAN FOUR-TIER DIAGNOSTIC TEST PADA MATERI OPTIK GEOMETRI
Get PDFABSTRACT
The purpose of this study was to describe the misconception that students on the geometricoptics use a Four-Tier Diagnostic Test in SMAN 1 Cluring. The population in thisresearch is the entire class XI in SMAN 1 Cluring. The selected samples for research area class of XI MIPA2, XI MIPA 3, and XI MIPA 4 which is selected using the method ofpurposive sampling area. Data collection methods used in this research is a method ofdocumentation and tests. The instruments used multiple choice diagnostic test shaped fourlevel. Based on the results of data analysis and discussion can be known that overallmisconception that students on the subject of geometric optics in SMAN 1 Cluring of37.62% so this qualifies a misconception to medium levels.Keywords: Misconception, Four-Tier Diagnostic Test, Geometric Optic
ANALISIS VIDEO KEJADIAN FISIKA DENGAN SOFTWARE TRACKER SEBAGAI RANCANGAN BAHAN AJAR MOMENTUM DAN IMPULS UNTUK MENINGKATKAN KEMAMPUAN BERFIKIR KRITIS SISWA SMA KELAS X
Get PDFThe purpose of this research was to analyze video of physics phenomenon on matter of momentum-impuls by using tracker software and then used as design of teaching material of momentum-impuls in increasing student critical thinking skills of senior high school at class X. This research type was research of descriptive analysis. The result of video analysis of physics phenomenon with tracker software prove there were 3 types of collision that were elastic collision, unelastic collision, and perfectly unelastic collision based on conservation of momentum, conservation of kinetic energy, and magnitude of restitution coefficients value. The magnitude of impuls equal to . The design of teaching material was design of student worksheets on momentum-impuls material to improve students' critical thinking skills consisting of titles, basic competencies, study guides, learning objectives, matter, assignments, and questions.Key words: video analyze, critical thinking skill, momentum and impuls, software tracker, teaching materia
PENGEMBANGAN MEDIA PEMBELAJARAN ULAR TANGGA BERBASIS ANDROID PADA POKOK BAHASAN GEJALA PEMANASAN GLOBAL UNTUK PEMBELAJARAN FISIKA DI SMA
Get PDFAbstractThis research was a developmental research. The product of this research was inthe use of an android -based snake and ladders as a learning media on the topic of globalwarming phenomenon in senior high schools. This research were developed by Borg andGall method that modified into 5 step: (1) study literature, (2) planning, (3) designing (4)validation and revision, and (5) testing media and final revision.The results showed thatthe use of an android -based snake and ladders as a learning media can be valid,practically anf effective for use. This can be seen from the validation assesment criteriagets valid with a assesment scores reached 4,552. The practically assesment showed frompercentage 93,33 % with a criteria practice indicating that the media was good for useaccording with the teacher implementation planned learning and also showed frompercentage 80,64 % with a criteria practice indicating that study activity learning washigh. The effectiveness assesment showed from improvement student learning outcomeswith the average of N-gain score was 0,73 which was in the high category.Keywords: effectiveness, practicality, android based snake and ladder, validit
ANALISIS KEMAMPUAN BERARGUMENTASI ILMIAH SISWA SMA PADA KONSEP TERMODINAMIKA
Get PDFABSTRACT Education plays a role and a very important factor in human life. Since formaleducation applies new curriculum which is curriculum 2013, it causes the students tohave less capability to make the argumentations toward the learning material. Thefacts on the real situation show that the ability to make argumentations about thesubject of physics on the concept of thermodynamics among students is still very low.So a scientific argument test is needed to find out how well the students’ understandingof physics material. Furthermore, by looking at how the students make theargumentations related to thermodynamic material, it will make the teacherunderstands the level students’ understanding of thermodynamic material. The resultof data analysis and discussion concluded that the percentage of of the level ofstudents’ scientific argumentation ability on the concept of thermodynamics in SMAX has the highest average of 41.60% based on indicator of argumentation’s proofwhich reaches the High criterion (T) and the highest average level of 51.96% basedon indicator of argumentation’s justification which meets the Medium criteria (S). Key word: Education, Science Argumentation, Thermodynamic Concep
ANALYSIS OF HIGH SCHOOL STUDENTS’ MISCONCEPTION IN ENERGY USING ORDERED AND REASONING MULTIPLE CHOICE
Get PDFAbstract While some misconceptions already believed by students, it will resist changing. Therefore,the earlier diagnosis of students’ misconceptions becomes crucial. This study determinedthe misconceptions experienced by students in energy and evaluated the use of OrderedMultiple Choice (OMC) and Reasoning Multiple Choice (RMC) test to measure it. Thesample in this study was two classes at SMA N 1 Samarinda that was taken by purposivesampling technique. The samples were had relatively similar capability in physics, taughtby the same teacher with same teaching method. From the result, it is found that there aresome misconceptions experienced by the students. In the first class, percentagemisconception measured by OMC are level 1 "Naive concept" of 10%, level 2 "Hybridconcept" as much as 36%. In the second class, percentage of misconception measured byRMC is 22%. The OMC test was able to detect misconceptions on students generally andclassified two common types of misconceptions: naive and hybrid. While the RMC testwas able to show the misconception that occurred in each student in-depth because studentswrote their reasons independently.Keywords: ordered multiple choice, reasoninng multiple choice, misconception, energ
PENGARUH LKS DENGAN STRATEGI INKUIRI TERBIMBING BERBASIS PENALARAN TERHADAP KETERAMPILAN PENGAMBILAN KEPUTUSAN SISWA SMA PADA MATERI ENERGI TERBARUKAN
Get PDFAbstrakPenelitian ini bertujuan untuk pengaruh LKS dengan strategi inkuiri terbimbing berbasis penalaranterhadap keterampilan pengambilan keputusan siswa SMA pada materi energi terbarukan. Penelitianini merujuk pada model pengembangan Kemp. Subjek penelitian adalah siswa kelas XII.Pengumpulan data dilakukan dengan teknik pengamatan, dokumentasi, angket, dan wawancara.Analisis data dilakukan dengan menggunakan analiss N-Gain. Hasil penelitian menunjukkan bahwaLKS dengan strategi inkuiri terbimbing berbasis penalaran dapat meningkatkan keterampilanpengambilan keputusan siswa SMA pada materi energi terbarukan.Kata Kunci: LKS, strategi inkuiri terbimbing berbasis penalaran, dan keterampilan pengambilankeputusa
PENGEMBANGAN MODUL PEMBELAJARAN FISIKA BERBASIS LEARNING CYCLE 5E POKOK BAHASAN GETARAN HARMONIS UNTUK SISWA SMA
Get PDFAbstract The use of modules and organizing a good material helped students tounderstand the material and students were able to achieve the results of the study.Integrated learning cycle 5E model into a module was one of the constructivistapproach that prioritizes the student as the center of the learning activities. Thisresearch resulted in a product module of learning physics-based 5E learning cycle inharmonious vibration subject for high school students. This research used 4-D designmodel of development. The results of the validation 3.98 and included in criteria quitevalid. The precentage of the effectiveness this module was 62.96% and included incriteria of effective. The practicality of the module retrieved the percentage of 85.2%,so it concluded that the use of the learning modules developed a very positive responsefrom students.Keyword: module based learning cycle 5E, validation, effetiveness, practicallit