Jurnal Pena Sains
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EFFICIENCY OF CREATIVE THINKING ABILITY IN AUGMENTED REALITY-BASED LEARNING MEDIA THE ACID RAIN THEME
Full text linkThis research was conducted due to the lack of students' awareness of the phenomenon of acid rain. The phenomenon of acid rain can be harmful to health and ecosystems. Whereas acid rain can be prevented by increasing the awareness of students through improving the quality of education, especially the ability to think creatively which is expected to help find solutions to minimize the impact of acid rain. However, students in Indonesia have a low quality of education which causes students' creative thinking skills to be low. This study aims to determine the efficiency of Augmented Reality-based learning media in the development of creative thinking skills of seventh grade students on the theme of Acid Rain. Augmented Reality-based learning media is a technology that combines 2D and 3D virtual objects from interactive applications, thus helping in growing students' creative thinking skills. The research method used is Research and Development (RD) according to Thiagarajan (1974) which was adapted based on the 4-D model. This model consists of 4 stages of development, namely define, design, develop, and disseminate. But the research is limited to the develop stage, because this research only focuses on the efficiency level of the Augmented Reality-based learning media developed. The results of the study based on the efficiency test of learning media based on Augmented Reality with the theme of acid rain for class VII SMP obtained an average value of 88.54% in the very efficient category. Keywords: Learning Media Based on Augmented Reality, Acid Rain, Creative Thinking Ability
LAKE WATER QUALITY ASSESSMENT IN UNIVERSITI SELANGOR BESTARI JAYA CAMPUS: A PRELIMINARY STUDY
Full text linkWater quality study on the main lake of Universiti Selangor (UNISEL) Bestari Jaya Campus was conducted on weekly basis for twelve weeks. The level of pollution in the lake was classified according to Interim National Water Quality Standard (INWQS) and Water Quality Index (WQI). Three sampling stations were chosen and the concentration of Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS) and Ammonia-Nitrogen (AN) were determined. Water samples were analyzed physically and chemically. The physical water quality parameter, Dissolved Oxygen (DO), temperature and pH were measured in situ and the chemical parameter of BOD, COD, TSS and AN were analyzed in the laboratory according to the APHA Method. Throughout the study period, the water temperature was recorded in the range of 28.0 oC to 29.1 oC and pH of the water was recorded at neutral level. Based on INWQS, COD, TSS, pH and AN parameters were classified in Class II. DO parameter was classified in Class III which indicate that the lake was slightly polluted and BOD parameter was classified Class V which is heavily polluted. Analysis of water parameter according to WQI showed the main lake was classified in Class IV. Based on these two water quality standards, this can be concluded that the main lake in UNISEL Bestari Jaya Campus were polluted and further actions need to be taken by the management of the university in order the improved the water quality of the lake
DEVELOPMENT OF E-BOOKLET THEME OF FOOD SECURITY BASED ON SCIENCE LITERACY FOR STUDENTS OF JUNIOR HIGH SCHOOL CLASS IX
Full text linkScientific literacy is the answer to prepare students to face the challenges of the 21st century. The resulting e-booklet product with the theme of food security based on science literacy is an alternative solution to improve students scientific literacy skills. The food security e-booklet contains food sources, substances contained in food and food processing methods which are compiled based on the integration of aspects of scientific literacy and problem based learning models. The research method used is the 4D development model developed by S. Thiagarajan, et al. (1974). However, the research on the development of this e-booklet was modified according to needs, consisting of the define, design, and develop stages. The assessment was carried out using a validation questionnaire that was assessed by a team of experts with two science education lecturers and one science teacher. The results of this study obtained the average value of the feasibility of the e-booklet on the theme of food security based on scientific literacy as a whole with a percentage of 84% in the very feasible category. Therefore, this e-booklet with the theme of food security reflects students' scientific literacy as a whole and is suitable for use. Keywords: e-booklet, scientific literacy, food security, problem based learning model
THE DEVELOPMENT OF STUDENTS WORKSHEETS BASED ON SCIENTIFIC APPROACH ORIENTED TO CRITICAL THINKING SKILLS ON THEME WAVE AND DISASTER
No full textNatural disasters can negatively affect life because they cause damage. Therefore, students have to be equipped with knowledge regarding them. One way is to use a student worksheet based on a scientific approach to waves and disasters. This research aimed to measure the validity levels of the student worksheet based on the developed scientific approach. According to Thiagarajan, the research and development method with the 4D development model. However, the development stage was narrowed down by defining, designing, and developing. These steps were done because this research is limited by energy, time, and cost and focused on measuring product validity; as a result, the dissemination stage was not conducted. The instrument used in this research was validation sheets filled out by two expert lecturers and three science teachers. The research results showed that the validity level of the student worksheet based on a scientific approach oriented to critical thinking skills on wave and disaster themes obtained a percentage of 83.62%, with very valid criteria. As a result, the student worksheet based on the scientific approach of the wave and disaster theme can be tested in science learning to foster students' critical thinking skills
STUDENTS' PERCEPTIONS AND ATTITUDES: IMPLEMENTATION OF VIRTUAL LABORATORY PHYSICS APPLICATIONS (PVL) DURING THE COVID-19 PANDEMIC
Full text linkThe coronavirus outbreak from 2019 had a significant impact on all sectors in Indonesia, especially the education sector, which requires learning from home. It provides a change in students' learning style to make educators change online-based learning using various platforms, one of which is the Physics Virtual Lab (PVL). This application is in a simulation designed explicitly physics practicum, accessed using a mobile phone. This study aims to determine how effective the use of PVL in fulfilling practicum activities is in terms of perceptions and competencies of students' attitudes. The research method is descriptive research to obtain an overview of PVL applications in physics practicum using domestic used materials. The subjects in this study were students of the first-semester science education study program who took the Basic Physics course—collecting data using perception questionnaires and attitude assessment sheets. The average student perception score is 4.22. Then, the students' attitude competence results obtained an average score of 80.88 integrity; independence 74.89; confidence 75.17 and responsibility 84.89. It shows that the implementation of PVL builds students' integrity and responsibility
THE POTENTIAL USE OF ANTI-NUTRITIONAL COMPOUNDS OF GADUNG TUBERS AS BIOPESTICIDES
Full text linkThe use of gadung (Discorea hispida dennst.) tubers as food source is not seen as an attractive option due to dioscorine and cyanide anti-nutritional compounds contained therein. The presence of dioscorine and cyanide compounds makes gadung tubers known as poisonous food. Although the community has known its poisonous nature, the use of gadung tubers as natural pesticides (biopesticides) is not commonly known by the community. Using gadung tubers as biopesticides provides solution to unanswered problems caused by chemical pesticides. This article seeks to describe the potential use of anti-nutritional compounds of gadung tubers as biopesticides based on literature reviews. Various literature related to anti-nutritional compounds contained in gadung tubers and their use as biopesticides have been analyzed in depth. The literature review results show that dioscorine and cyanide anti-nutritional compounds are toxic and can be used as biopesticides. The effectiveness of gadung tubers on various agricultural pests depends entirely on the concentration of gadung tubers used. The use of gadung tubers as biopesticides is needed to increase and maintain the productivity of agricultural land in addition to preserving natural resources
PRELIMINARY STUDY: CHEMISTRY LABORATORY VIRTUAL INNOVATION AS AN OPTIMIZATION OF SCIENCE LEARNING DURING THE COVID-19 PANDEMIC
Full text linkThe purpose of this research is to conduct a preliminary study to create a virtual chemistry laboratory innovation to optimize learning during the Covid-19 pandemic in the Natural Science Education Study Program of the Teacher Training and Education Faculty Universitas Sebelas Maret (FKIP UNS). The Natural Science Education Study Program of FKIP UNS itself teaches chemical concepts that require laboratory activity. This study used the descriptive qualitative method. Data was collected using observation, interviews, and analysis of related documents and equipped with a Focus Group Discussion (FGD) with students and lecturers (Science Education and Chemistry Education FKIP UNS). The results showed that 11 chemistry practicums required virtual laboratory innovation in the Natural Science Education Study Program of FKIP UNS due to restrictions on the use of laboratories by the campus. It was concluded that a virtual chemistry laboratory was needed as an alternative to student practicum activities to maintain and optimize laboratory skills in online learning. In addition, the developed virtual laboratory needs to be embedded online and can be accessed through various gadgets so that it can be used anytime and anywhere
THE INFLUENCE OF NaCl SOLUTION FLOW RATE ON ION ABSORPTION OF CAPACITIVE ELECTRIC CARBON PLATE
Full text linkResearch on desalination technology in seawater is being developed. This is because sea water has not been used optimally to meet community needs. One of the rapidly developing desalination systems is desalination technology using a capacitive carbon plate. The development of this desalination system technology is carried out using electrode plates made of carbon. These plates are capable of absorbing salt ions through the porous surface. The amount of ion absorbed is determined by the pore surface structure of the plate, the salt flow rate, the number of plates used, the applied voltage and other factors. The salt flow rate between the carbon plates determines the speed of the salt ions to reach the smallest pores on each plate surface. For this reason, this article has conducted research by testing the variation in the flow rate of NaCl solution to the amount of salt ions absorbed on the carbon plate
DEVELOPMENT OF INTEGRATED SCIENCE LEARNING INSTRUMENTS USING A HUMANISTIC APPROACH WITH ECONOMIC DRAWINGS
Full text linkResearch on the development of integrated science learning instruments helps students to develop their potential and character. The research involved the use of lesson plans, worksheets, syllabus, props and modules through four stages, namely the Four-D Model flow, namely definition, design, development, and dissemination. This research was conducted at MTsN 4 Bojonegoro. The research method is qualitative research by observing the field and collecting data based on the results of tests and questionnaires. The results of the study are as follows 1) students are more motivated to use teaching aids in integrated science learning, 2) by using economic teaching aids, students get an increase in cognitive knowledge and also character education and understand the relationship between knowledge and attitudes or actions in everyday life, 3) integrated science learning with economic aids should be used more intensively in science learning with different themes, 4) Each subject should provide opportunities for the teaching staff to develop economic teaching aids by utilizing used tools and materials from the surrounding environment