While the importance of explicit and reflective NOS instruction is clear in the literature, questions remain about how to enact such instruction. That is, literature is sometimes unclear in defining how to enact explicit and reflective NOS instruction. While some authors recommend using questions (e.g., Clough 2007) to enact effective NOS…

In the study reported on here, the effects of science centres on the perceptions of secondary school students towards the nature of science were examined. The study group consisted of 16 students aged 13 and 14 of which 7 were female and 9 male. In this study, a total of 4 trips were arranged to the science centre twice a month for 2 months.…

During the early decades of the 18th century, Newtonian physics was still new. Much effort was expended in testing its validity. One arena in which evidence could be found was the shape of Earth. Was it perfectly spherical? On the observational side there were two hints. In 1671 Jean Richer had measured the rate of ticking of a pendulum clock near…

Vector cross product transformations are essential components in general physics. The numerous mnemonic devices catered towards each potential transformation result in confusion, defeating their purpose of reducing learning barriers. Therefore, a general mnemonic device, subject-environment interaction or the subject, is proposed to help students…

It is proposed a network approach for electric circuits simplification, that through a unified systematic procedure allows simplifying circuits of any complexity, and evaluation of the equivalent resistances, capacitors and inductors. Circuits to be simplified are characterized by their nodes, and by the elements of different types (resistances,…

The tidal forces generated by a black hole can be so powerful that they cause unlimited stretching, known as spaghettification. A detailed analysis of this phenomenon requires the use of Einstein's theory of general relativity. The aim of this paper is to offer an up-to-date and accessible analysis of spaghettification, in which the complex…

National science reform documents recommend several nature of science (NOS) elements to introduce to children early in the science curriculum. A researcher developed questionnaire was used to gather information from a random, national sample about early elementary teachers' perceptions of the developmental appropriateness of 12 NOS aspects for the…

A popular introductory physics laboratory experiment is one focusing on Snell's law. This is straightforward to complete with lasers and prisms, but here we present an alternative version that guides the students through some of the major historical developments, recreating and analyzing significant experiments. The discovery of Snell's law has a…

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…