<p>Nanoparticles of magnetite (Fe₃O₄) have been successfully synthesized by coprecipitation method by mixing FeSO₄.7H₂O and FeCl_3.6H₂O with the addition of 10% NH₄OH as kopresipitan. Then, functionalized Fe₃O₄  concentration variation silica (SiO₂) 5%, 10%, 15%, 20%, 30% and 50%. Particle size and magnetic properties of Fe3O4 nanoparticles were tested by X-Ray Diffraction (XRD) and Vibrating Sample Magnetometer (VSM). XRD results showed the addition of silica is not found new phases when added SiO₂that serves as a template. The particle size of Fe₃O₄ nanoparticles obtained 14.23 nm, while the Fe₃O₄nanoparticles with the addition of a concentration of 5% and 20% respectively SiO₂15.45 nm and 16.37 nm. VSM results show the value of saturation magnetization and remanent magnetization decreased as more silica concentration, and increased coercivity field. Test Results of Fourier Transform Infra Red (FTIR) obtained new peaks which indicate that the functionalization process Fe₃O₄ with silica has been successfully carried out.</p>

Technology-based instrument is one of the main factors in improving the quality of learning in the classroom. The purpose of the study was to see pre-service teacher' response using  Kahoot as evaluation tool. This study was carried out on third year students in  UniversitasKhairun. The study employed a questionnaire that consists of 15 items about the excess of Kahoot. A total of 23 subjects participated in this study. The students highly perceived Kahoot as a game that can increase self-confidence, a fun game, interesting game, and the most useful tools to be used later when the students become teacher

The geological condition of Morotai Island is influenced by small faults and tectonic activity from several major and minor plates that form the subduction zone, are the Pacific plate, the Philippine plate, the Sangihe plate, and the Moluccas Sea plate. This causes Morotai Island to have a high potential for earthquake hazards. South Morotai is the center of government, services, trade and economy on Morotai Island, and has a high potential for earthquakes. Therefore, an analysis of the distribution of seismic vulnerability values ​​in South Morotai was carried out based on mapping as a disaster mitigation effort in South Morotai. The microtremor method uses the H/V spectral ratio analysis technique to analyze the level of earthquake hazard based on the value of the seismic vulnerability index by considering local soil conditions. The ground frequency value (f0) obtained when measuring microtremor is between 0.6 Hz to 0.7 Hz. The amplitude value (A0) in the South Morotai area is around 1.9 – 5.2 times strengthening. The value of the seismic susceptibility index (Kg) in the study area is calculated based on the value of the basic frequency and amplitude with between 5.9 to 44.8. It was concluded that the distribution of a high Kg index and an earthquake prone area was in Darame Village, Muhajirin Village, and Wawama Village with a Kg value > 20. This area is composed of alluvium consisting of gravel, potential mud, and boulders, so it is classified into soft soil type. Less vulnerable areas are in Gotalamo Village, Daruba Pantai Village, and Darame Village

The implementation of this activity aims to introduce simple earthquake props as learning media to improve earthquake disaster literacy for students. The implementation method consists of 3 stages, namely 1) preliminary preparation to analyze the situation in the field regarding the level of earthquake disaster literacy of students and design simple earthquake alarm props as learning media in schools, 2) implementation by teaching in the form of socialization and 3) evaluation is carried out to evaluate the results achieved by students. The results of this activity showed an increase in the average earthquake disaster literacy of students from 77 to 95 after the socialization. The implementation of this activity went well and smoothly, so that students were very interested in learning media by using earthquake props as a medium for earthquake literacy and building a conscious attitude of students towards earthquakes.   Abstrak Pelaksanaan kegiatan ini bertujuan untuk memperkenalkan alat peraga gempabumi sederhana sebagai media pembelajaran untuk meningkatkan literasi bencana gempabumi bagi peserta didik. Untuk metode pelaksanaan terdiri dari 3 tahap, yaitu 1) persiapan pendahuluan untuk menganalisis situasi di lapangan mengenai tingkat literasi bencana gempabumi peserta didik dan mendesain alat peraga alarm gempabumi sederhana sebagai media pembelajaran di sekolah, 2) pelaksanaan dengan melakukan pengajaran dalam bentuk sosialisasi dan 3) evaluasi dilakukan untuk mengevaluasi atas hasil yang telah dicapai oleh peserta didik. Hasil kegiatan ini menunjukan terjadinya peningkatan rata-rata literasi bencana gempabumi peserta didik dari 77 menjadi 95 setelah diadakan sosialisasi. Pelaksanaan kegiatan ini berjalan dengan baik dan lancar, sehingga peserta didik sangat tertarik dengan media pembelajaran dengan menggunakan alat peraga gempabumi sebagai media literasi gempabumi dan membangun sikap sadar peserta didik terhadap gempabumi.