Pengembangan Bertanya Kritis Berbasis Inkuiri (Bkbi) Untuk Pembelajaran Kimia

: Curriculum 2013 recommended that the learning is done with a scientific approach. The key to the success of this learning approach is the student ability to ask critical questioning. Some studies of chemistry learning show students have difficulty to ask critical questions (Katchevich & Hofstein, 2013; Eshach et al., 2014; Santoso, 2014). These problem can certainly reduce the level of activity of students in constructing their own knowledge based on what is becoming a problem for him. To overcome these problems, it is necessary the development of inquiry learning that involves students asking question during the learning takes place. This article describes the development of learning “critical question - inquiry based for learning Chemistry", which is derived from theoretical studies that have been validated by several experts of learning science

Pengembangan Perangkat Pembelajaran Model Inkuiri Untuk Melatihkan Keterampilan Proses Sains Dan Penguasaan Konsep Siswa SMP

The research aims to develop inquiry learning materials to facilitate science process skills and science concept mastery the junior high school students in energy and works matter. The research was conducted through two phase that is development phase by using 4-D models and implementation phase using one group pretest-posttest design. Data collection methods used test and observation, while the data analysis techniques using inferential parametric, quantitative descriptive, and qualitative descriptive. The result were obtained: the devices that have been developed are generally categorized as well; RPP performing well; activity is the dominant doing observation; The results also showed that mean of N-gain score mastery of concepts in high category; science process skills in high category; students mastery of the concept after learning improving; students responses to learning a positive model of inquiry. Based on the research results, it can be concluded that the develop inquiry learning materials effective that can be applied in learning activities in grade VIII of SMP

Penggunaan Natrium Tripolifosfat Untuk Meningkatkan Masa Simpan Daging Ayam

The aim of the study was to know the storage period of chicken on the USAge of sodium tripolyphosphate ). The study was carried on two stages. The first stage, the Post Test Only Control Group Design, was to find the variation of sodium tripolyphosphate concentration and the length time of soaking to meet the requirement of P2O5 content and the quality of chicken muscle. The independent variables were sodium tripolyphosphate concentration and soaking time; while the dependent ones were: P O content and organoleptic parameter (i.e. color, flavor, texture). The second stage, the Fac- torial Design, was to know the storage period. The independent variables were variation of sodium tripolyphosphate concentration and soaking time, and storage period; while the dependent variables were chemical and microbiological quality. Data analysis were qualitative and quantitative descriptive. The results of the first stage study revealed that the variation of the sodium tripolyphosphate concentration and soaking time to meet the requirement of P2O5 content and the quality of chicken musle were: 55 g/l – 20 minutes, 70 g/l – 10 minutes, and 70 g/l – 20 minutes. The second stagestudy showed that the storage period of chicken muscle was 6 hours when variations of 70 g/l sodium tripolyphosphate concentration and 20 minutes soaking time were applied, variation of 70 g/l sodium tripolyphosphate concentration and 10 minutes soaking time was 3 hours storage period; while variation of 50 g/l sodium tripolyphosphate concentra- tion and 20 minutes soaking time, for less than 3 hours storage period