This qualitative study analyses how effective an activity based on the critical and reflexive reading of the historical case of Rosalind Franklin and the elucidation of the molecular structure of DNA can be for learning about the nature of science (NOS). The aspects of NOS addressed are the plurality of methods in scientific research, research…

During a 10-week professional physical science professional development (PD) course, elementary inservice teachers (n = 18) in a large urban district were engaged in explicit-reflective nature of science (NOS) instruction. Teachers were also explicitly engaged in reflection concerning NOS pedagogy (e.g., explicit-reflective, role of context).…

This study aimed to develop a Nature of Science Understandings Questionnaire within Associated Approaches (NoSQ-AA) by discussing "consensus view" of the teaching of nature of science (NoS) in light of critiques and suggestions. The second purpose of this paper was to evaluate pre-service science teachers (PSSTs)' nature of science…

This study aims to examine the effects of explicit-reflective nature of science (NOS) activities on science teacher candidates' views on the nature of science and self-efficacy beliefs about teaching the nature of science, using a single-group pre-test-post-test experimental method. The research sample included 120 science teacher candidates…

A simple photometric device was built to measure the kinetics of the title reaction. The device consisted of a green light-emitting diode (centered at 520 nm), a sample vial, a photodiode, and an Arduino microcontroller board. These parts were mounted on a black poly(lactic acid) holder which was manufactured by utilizing three-dimensional…

Ultrafast laser pump-probe spectroscopy is an important and growing field of physical chemistry that allows the measurement of chemical dynamics on their natural time scales, but undergraduate laboratory courses lack examples of such spectroscopy and the interpretation of the dynamics that occur. Here we develop and implement an ultrafast…

Einstein's theory of general relativity (GR) provides the best available description of gravity. The recent detection of gravitational waves and the first picture of a black hole have provided spectacular confirmations of GR, as well as arousing substantial interest in topics related to gravitation. However, to understand present and future…

In this paper we consider the well-known experiment with the 'heavy' newspaper that breaks a stick that it is laid on. Using several appropriate control experiments we show that the currently invoked explanation using atmospheric pressure cannot be correct. We perform a theoretical analysis and propose a new explanation based on the rotational…

Background: Teachers' views of nature of science (NOS) play a key-role in how they teach science and can significantly impact their students' understanding of and achievement in science. NOS has been a curriculum goal in science education for several decades. Therefore, there is a need for assessment tools that can examine views of NOS in the…

This study investigated evidence of how students' mental models of fundamental kinematic relations evolved (i.e., developed cognitively over time) as observed during an introductory course in calculus-based classical mechanics. The core of the curriculum is based on a claim known as Galileo's principle of relativity. The course material comprised…

This study was aimed at assessing the research trends in the family resemblance approach to the nature of science (FRA-to-NOS). This was accomplished through bibliometric analysis using the R program and a literature review employing the analysis framework. The findings demonstrated that the field of FRA-to-NOS has been experiencing growth, with…

This study employed a case study methodology to investigate students' misconceptions about solid, liquid, and atmospheric pressure. The research included 36 8th-grade students from various middle schools in Giresun, comprising 19 girls and 17 boys. Data collection involved a test consisting of 14 concept cartoon questions, and the concept cartoons…

This study aims to compare the effect of formative assessment with explicit-reflective instruction and explicit-reflective on pre-school prospective teachers' views about the nature of science and scientific knowledge. In this study, it was used a pretestposttest nonequivalent control group design and the sample of the study consists of 66…

A multistep synthesis of a novel arylidene 3­(2"H")-furanone has been designed and optimized for the second-year organic laboratory. The three-step sequence consists of a nucleophilic substitution, intramolecular cyclization, and acid-catalyzed aldol condensation, and can be carried out within two 3 h laboratory periods. The final…

The law of conservation of momentum is a fundamental law of nature. It states that the momentum of an isolated system is conserved. In high school or introductory-level physics courses, for simplicity, teachers and textbooks always use collisions in one dimension as the examples to introduce the concept of conservation of momentum. To solve simple…