جستجوی مقالات مرتبط با کلیدواژه « اندازه گیری » در نشریات گروه « میان رشته ای »

Heat transfer, which is the movement of heat across the boundary of the system due to the temperature difference between the system and its surroundings, is a well-known phenomenon in everyday life. When cooking or insulating houses, people use the related concepts without knowing the physical principles of this phenomenon. Heat transfer is intuitively related to material properties, that is, to the physical concept of heat conduction. Despite the simplicity of the concept, heat conduction is usually difficult to measure. In this article, a simple, fast and practical method is introduced that gives completely accurate values for the coefficient of thermal conductivity of insulating and semi-insulating materials and is suitable for teaching this concept and implementing it in a classroom environment. Heat transfer, which is the movement of heat across the boundary of the system due to the temperature difference between the system and its surroundings, is a well-known phenomenon in everyday life. When cooking or insulating houses, people use the related concepts without knowing the physical principles of this phenomenon. Heat transfer is intuitively related to material properties, that is, to the physical concept of heat conduction.

The purpose of this study was to evaluate the effect of multiple representational education on meaningful learning of the concepts of length, level, and volume measurement in elementary students. Multiple representation means introducing or demonstrating a concept in different situations and forms that can create a deep understanding in the learner's mind. The research method was semi-experimental with two experimental and control groups. Samples were selected by convenience sampling method and were divided into two equal groups of experimental and control. In the experimental group, the concepts were taught in a multiple-presentation manner and in the control group, in the traditional way. Finally, a post-test with conceptual questions was given to students in both groups. Validity of these tests was measured by CVR method and confirmed by 0.99. Cronbach's alpha reliability was 0.887 for pre-test and 0.727 for post-test. The results were analyzed by t-test for two independent groups using SPSS software. The findings of the study showed that teaching based on multiple representations had a significant effect on the meaningful learning of the measurement topic.