JIPF (Jurnal Ilmu Pendidikan Fisika)
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Characteristics of Hydro-Oceanography in the Coastal Waters of Kura-Kura Beach, Bengkayang Regency
Get PDFThe waters of Kura-Kura Beach have quite a lot of human activities, one of which is tourism. The study aims to observe Hydro-Oceanographic parameters such as tidal conditions, ocean currents, and waves. The study uses field observation data and simulation results. The data is calculated to find Formzhal number based on the amplitude of tidal harmonic constants. The Flow analysis to determine the pattern and velocity of the current. The height and period of the wave to analyze characteristics of the wave. The results show that the tide in Kura-Kura Beach waters is a daily mix of a double with the highest tide at MSL and a minimum tide of 0.43 below MSL. While the current velocity obtained from the yield model has a range of (0.003 - 0.11) m/s, and the measurement results are between (0.005 - 0.14) m/s. The simulation results show that the current moves from land to sea at low tide, and it moves from sea to land at toward the tide. For the height of the ocean waves that are formed in a period of 10 years (2009 - 2019) ranges from (0.09 - 154) m and the wave period (1.86 - 5.73) seconds. Based on the calculation results, the largest wave energy occurs in the second intermediate period, namely 184.21 Joules/m with height and wave periods of 1.21 m and 4.39 seconds. In contrast, the smallest wave energy occurs in the first intermediate period with minimum wave height and period 0.18 m and 3.08 seconds. In general, based on the simulation of the current velocity model, the forecasting of wave height and wave energy in Kura-Kura Beach waters is still relatively small. So, it can be concluded that the location is still categorized as safe for coastal tourism and other activities
Development of Current Stick Teaching Aids to Improve Students' Generic Science Skills
Get PDFThe study aimed to develop the Current Stick teaching aids and determine its effectiveness to improve students’ generic skills. The type of research is development research which involved 180 students of class X SMAN in Blora were chosen through cluster random sampling. The instrument used to collect the data was a validated question sheet from the assessment of students’ practicum report in using Current Stick teaching aids and the observation sheet. The instruments were addressed to students from the control class and experimental class. The obtained data were tabulated and analyzed by using t-test. The result shows that the experimental class achieved an average percentage of generic science skills of 77.2%, while the control class reached 66.4%. It reveals that the difference in the percentage of generic science skills is the result of using Current Stick teaching aids. Based on the results and discussion, it was found that the development of Current Stick teaching aid is effective to improve students' Generic Science skills
Learning Activities in Physics Using Students Worksheet Based on Predict-Observe-Explain (POE)
Get PDFThis research aims to describe students learning activities through the implementation of students worksheets based on POE. This study was descriptive qualitative research. The research was conducted in one of the Islamic Senior High School in Bantul, Yogyakarta on Circular Motion material. The research subject was determined through random sampling. The number of subjects in this research consisted of 26 students in the first year. Data were collected using an observation sheet in 3 meetings observed by two persons and the interview. The results of the analysis obtained are expressed in terms of percentages and then interpreted in the form of scientific narratives. Data analysis results show that the students’ worksheet based on POE can be used to enhance students’ learning activities, especially in visual activities, oral activities, writing activities, motor activities, and mental activities with the most dominant activities is writing activities, and the weakest one is oral activities. Students feel that using students’ worksheets based on predict-observe-explain makes them involved directly in the demonstration or the practicum, can create their curiosity, make they even more seriously in the study, increase the interest in studying physics and help each other with their friends. But, the students’ confidence and speaking ability must be the concern, so students are not reluctant to share their idea in front of the class
The Effectiveness of POE (Predict-Observe-Explain) Learning Model for Improving Student Analytical Skills
Get PDFThis study aims to determine (1) differences in students' analytical skills in learning physics with the POE (Predict-Observe-Explain) learning model and direct instruction learning, (2) improve students' analytical skills by learning physics POE learning models. This study uses a quasi-experimental method and control-group pre-test post-test design. The research subjects were Grade VIII students of a junior high school in a District of Wonosobo Regency, Central Java. The data instruments is test. Data analysis techniques using different test and gain test. The results showed: (1) there were differences in analysis skills between students who used the POE learning model and did not use the POE model seen from the results of the t-test with dk 47 and 5% significance level where tcount> ttable was 5.49> 2.012, (2) improvement of students' analytical skills using the POE model is greater than the students who do not use the POE model with a gain test of 0.60 (medium criteria)> 0.32 (medium criteria)
Investigation of Aquifer Zone in Tambakromo Village, Ponjong Subdistrict, Gunung Kidul Regency, Yogyakarta, Indonesia
Get PDFThe presence of surface water is always being a primary issue in Gunung Kidul regency. An aquifer investigation would support groundwater exploration. The research area is located in Tambakromo village, Ponjong subdistrict, Gunung Kidul Regency, Daerah Istimewa Yogyakarta Province. The aim of this research is about geological and subsurface conditions based on geological data and geoelectrical resistivity methods. By resistivity value interpretation, the position, depth, and thickness of aquifer could be determined. The purpose of this research is to identification of geological conditions that supported being aquifer rock. The method in this research is used geological mapping combined with petrographic analysis. The geophysics method is used to identification of aquifer in research area. Three locations were selected to acquisition geoelectrical resistivity survey. In Grogol village, there is no aquifer based on resistivity values of more than 10000 ohmmeters (andesitic breccia). An akuifuge is interpreted there in andesitic breccia instead of the presence of aquifer. The tuffaceous is interpreted as lapillistone that contained the glass with resistivity value of 43.63 and 340.11 ohmmeters. The Garon and Sumberejo village have aquifer at depth of 50 to 80 meters with a thickness of 13 to 70 meters. The type of aquifer in both area is included an unconfined aquifer, specifically located in between the limestone rock layer and andesitic breccia. By regional stratigraphic correlation, tuffaceous lapillistone is interpreted as derived from Semilir Formation. In addition, the presence of aquifer in research area could recommend for local people and government to reduce the drought disaster
Improving Students’ Critical Thinking Skills Trough Contextual Teaching and Learning Science Module
Get PDFThis study aims to determine the effectiveness of the science module based on the contextual learning approach (CTL) in improving the critical thinking skills of junior high school students. The research method used was a quasi-experimental study involving 30 students in the experimental class and 30 students in the control class from a junior high school in Surakarta. The data collection technique was done by measuring students' critical thinking skills before (pretest) and after learning using the Science module (posttest). The instrument used was a critical thinking skill test based on Facione's critical thinking skills indicator. The improvement of students 'critical thinking skills was analyzed using a pretest-posttest gain score and followed by an independent sample t-test to determine the significance of the difference in the average increase in students' critical thinking skills. The results showed that the use of a science module based on a contextual learning approach could improve students' critical thinking skills, with a score of 0.46, or in the category of moderate improvement compared to control class students, with a score of 0.29, or in the low improvement category. Meanwhile, based on the results of the t-test the average gain score of the two classes shows a significant difference in the improvement of critical thinking skills between students who are taught using the Science module and students who are taught using conventional modules
Description of Students Critical Thinking Ability in Temperature and Calor Material
Get PDFThe purpose of this study was to describe the critical thinking skills of students of SMAN 8 Muaro Jambi in physics learning material temperature and heat. The approach used in this study is a mixed-methods approach with a sequential explanatory design that combines sequential quantitative and qualitative research methods. The sample used in this study was 96 students of SMAN 8 Muaro Jambi. Data collection techniques using tests and interviews. The results showed that for the mastery of critical thinking skills as a whole on the material, the temperature and heat of the students were at a non-critical level with a percentage of 40.5%. Based on the results of the study, it was found that students of SMAN 8 Muaro Jambi were in the non-critical category. The low ability of students to think critically is because students are not used to being presented with active learning that maximizes their thinking potential. By doing this research, the teacher can improve students' critical thinking skills in learning physics, especially temperature and heat material
Identifying Science Content Knowledge of Primary School Pre-Service Teachers at the Essential Physics Concepts
Get PDFScience Content Knowledge (SCK) teachers are one of the main things in providing science learning that follows scientific conceptions. One of the causes of misconceptions or inappropriate concepts that students have regarding science is the teacher. So, the purpose of this study is to identify pre-service teachers at primary school about the SCK. The research method used in this study is a quantitative method with a survey design. Data were collected from 131 participants from the Primary School Teacher Education Program in the early semester. The essential concepts in science (physics) used in the study are elementary and junior high school. The instrument is a multiple-choice test with four answers choices with 40 questions. The study finds that for almost every essential physics/science concept, the SCK of the pre-service teachers needs to be improved. This result contradicts our expectations considering the concepts being tested are for elementary and junior high schools. SCK is playing an important element in giving the quality of learning science and building and preparing students to meet the next educational level. Thus, teaching physics from an early age must be taught conceptually and presented with appropriate representations to make it easier for students to learn
Development of Instructional Module Based on Inquiry-Interactive Demonstration to Improve Students’ Critical Thinking Skill
Get PDFThis research was a research and development (R&D) that produced products in the form of learning modules. The purpose of this research are to find out: (1) The characteristics of the material classification and its changes instructional module; (2) The feasibility of the material classification and its changes instructional module; (3) The instructional module effectiveness in increasing critical thinking skills. The procedure of this research are: (1) preliminary research & information gathering; (2) planning (3) initial product development; (4) initial field trial; (5) major product revisions; (6) main field test; (7) operational product revisions; (8) operational field test;(9) final product revision. The results of research and development show: (1) the characteristics of the instructional module as learning objects in accordance with the inquiry-interactive demonstration learning on the classification material and its changes; (2) instructional module eligibility based on experts assessment, education practitioners, and students produces 81.74% achievement with very good qualifications; (3) module as learning objects resulting from the development are effective in improving students' critical thinking skills with an N-Gain score of 0.561
Development of Science Literacy Assessment Based on Multi Representation of Rectilinear Motion Concept to Investigate Students' Science Literacy Competencies
Get PDFThere have been many assessment instruments developed to measure student science literacy. However, literacy measurement instruments that pay attention to various intelligences and are reflected in the context of multiple representations have not been developed much. On the other hand, it is important to give every student the opportunity to succeed at his intelligence level. This study aims to determine the feasibility of a multi-representation based scientific literacy assessment instrument for high school physics on rectilinear motion concept as well as to describe students' scientific literacy skills and the mastery pattern of the rectilinear motion concept measured by the instrument developed. This research is a Research & Development (R&D) research. The test subjects were 262 high school students who had studied rectilinear motion concept in public high schools with A-accreditation. Data analysis conducted were validity test of instruments by experts; empirical test to obtain validity, reliability, difficulty level, and item difference; student responses to test offerings; profile of scientific literacy skills; and the pattern of mastery of the rectilinear motion concept. From the measurement results, it is evident that the profile of the average scientific literacy ability of high school students is still in the unsatisfactory category. The pattern of mastery of the concept of straight motion based on the modes of representation ranging from the most difficult to the easier ones is graphical, pictorial, verbal, and mathematical representations. This data could indicate that learning by practicing literacy skills still can be improved