Spektrum Cahaya Sebagai Alternatif Media Pembelajaran Praktikum Fisika

Spectrometer merupakan instrument yang digunakan untuk mengamati dan mengukur sudut deviasi cahaya datang yang dikarenakan pembiasan dan dispersi oleh medium. Spectrometer pada umumnya berfungsi untuk menganalisis cahaya yang datang dari sumber cahaya dengan menggunakan kisi difraksi dalam proses penggunaan nya. Penelitian ini merupakan penelitian pengembangan dengan metode eksperimen. Teknik analisis data yang digunakan adalah deskriptif analisis kuantitatif dengan membandingkan hasil analisis alat dengan persamaan matematis. Tujuan dari penelitian ini adalah menghasilkan alat pengukur panjang gelombang cahaya serta mengetahui pengaruh variasi merk dan daya lampu, celah kolimator, dan jarak teleskop terhadap hasil pembiasan cahaya oleh prisma. Hasil penelitian menunjukkan telah dihasilkan alat spectrum cahaya serta tidak terdapat pengaruh antara hasil pembiasan dengan variasi merk dan daya lampu, celah, dan jarak teleskop.

SOCIO-SCIENTIFIC STUDY: RELATIONSHIP OF STUDENTS' SOCIAL INTERACTIONS WITH NATURAL SCIENCES LEARNING OUTCOMES

Social interactions that occur between individuals in natural sciences are called socio-scientific. Socio-scientific norms are rules derived from mathematical values brought into the social context. norms are seen as being able to increase students' understanding. The main focus in this research are, (1) Analyzing social content in elementary natural sciences learning courses; (2) Describe the process of social interaction on research subjects; and (3) describe the relationship between social interaction and natural sciences learning outcomes. This type of research is quantitative with a descriptive approach. Study subjects was 100 prospective elementary school teachers. Data collection techniques was using survey methods and analysis of student’s final exam in natural sciences test. Data analysis uses simple linear regression analysis. From the research, the results are obtained: (1) Mathematical content in the lecture process has been raised by the lecturer. The lecture system in the form of group discussions can improve students' communication, courage and collaboration skills. (2) The description of students' social interactions can be modeled. Social interaction models show social interaction can be in the form of associative and dissociative. (3) There is a relationship between social interaction with learning outcomes in natural sciences. The relationship is quite strong, and social interaction influences student natural sciences learning outcomes

The Effect of Problem Based Learning Models on Practicum Based Argumentation Skills on Heat to Electricity Conversion Material

This study aims to determine the effect of problem based learning models on student-based argumentation skills on heat to electricity conversion nature. The population of this research is all students of XII SMA Negeri 4 Bandarlampung. The selection of research samples using purposive sampling technique with a sample of class XII Science 3 totale sample are 30 students as an experimental class. The research design used was One Group Pretest-Posttest Design. Data were tested by N-gain analysis, normality test, and Paired Sample T-Test. Based on research conducted, using the Paired Sample T-Test, the Sig. (2-Tailed) is less than 0.05 which is 0,000, so it can be stated that there is an influence of problem based learning models on practicum-based student argumentation skills in the method of converting heat to electricity. The average N-gain (g) of argumentation skills in the experimental class is 0.80 with a high category. Based on the results of student argumentation tests show that 89.5% are categorized as Claims, namely students are able to express their opinions in written form based on the understanding of the questions given, 83.0% are categorized as Data, ie students understand the questions given so that they can write down any information based on the knowledge they know, 80.2% is categorized as a warrant, ie students are able to explain the relationship between Data and Claims. This shows that the problem based learning model is very effective and has a big impact on the improvement of argumentation skills. The problem based learning model can improve students' argumentation skills.