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Showing 1 to 15 of 92 results Save | Export
Tyler A. Shaffer; Carlos U. Herrada; Avery M. Walker; Laura D. Casto-Boggess; Lisa A. Holland; Timothy R. Johnson; Megan E. Jones; Yousef S. Elshamy – Journal of Chemical Education, 2023
Electrophoresis is integral to analytical and biochemistry experiences in undergraduate education; however, fundamental principles of the method are often taught in upper-level laboratories through hands-on experiences. A laboratory activity is reported that teaches the concepts of electrophoretic mobility and electroosmotic flow. A single…
Descriptors: Chemistry, Science Instruction, Teaching Methods, Cost Effectiveness
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Jiménez-Liso, Maria Rut; López-Banet, Luisa; Dillon, Justin – Science & Education, 2020
We propose explicit and implicit approaches for the teaching of acid-base chemistry based on research into the history and nature of science (NoS). To support these instructional proposals, we identify four rationales for students to understand acid-base processes: daily life, socio-scientific, curriculum, and history of science. The extensive…
Descriptors: Chemistry, Science Instruction, Teaching Methods, Scientific Concepts
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Smith, Maureen E.; Johnson, Sara L.; Masterson, Douglas S. – Journal of Chemical Education, 2013
A two-part demonstration was conducted in our first-semester organic chemistry course designed to introduce students to the formation of alcohols, regioselective reactions, and analysis of organic products by NMR analysis. This demonstration utilized the oxymercuration-demercuration sequence to prepare an alcohol from an alkene in a Markovnikov…
Descriptors: Science Instruction, College Science, Scientific Principles, Organic Chemistry
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Countryman, Lyn L.; Maroo, Jill D. – American Biology Teacher, 2015
Considerable anecdotal evidence indicates that some of the most difficult concepts that both high school and undergraduate elementary-education students struggle with are those surrounding evolutionary principles, especially speciation. It's no wonder that entry-level biology students are confused, when biologists have multiple definitions of…
Descriptors: Secondary School Science, College Science, Evolution, Scientific Principles
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Swinehart, William E.; Zimmerman, Bonnie L.; Powell, Kinsey; Moore, Stephen D.; Iordanov, Tzvetelin D. – Journal of Chemical Education, 2014
A concept of the turbidimetric method for determining the concentration of ethanol in water-ethanol mixtures is described. A closed sample cell containing the analyte was heated to achieve vapor saturation and subsequent condensation. As the condensation occurred, the decrease in percentage transmittance with time due to light scattering was…
Descriptors: Science Instruction, Scientific Principles, Water, Light
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Johnson, Brian J.; Graham, Kate J. – Journal of Chemical Education, 2015
This paper will describe a guided inquiry activity for teaching ligand field theory. Previous research suggests the guided inquiry approach is highly effective for student learning. This activity familiarizes students with the key concepts of molecular orbital theory applied to coordination complexes. Students will learn to identify factors that…
Descriptors: Inquiry, Science Instruction, Teaching Methods, Scientific Concepts
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Howard, Ava R. – American Biology Teacher, 2014
Use of real specimens brings the study of biology to life. This activity brings easily acquired plant specimens into the classroom to tackle common alternative conceptions regarding life, size, complexity, the nature of science, and plants as multicellular organisms. The activity occurs after a discussion of the characteristics of life and engages…
Descriptors: Plants (Botany), Biology, Science Instruction, Science Activities
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Lee, Scott A.; Thomas, Joshua D. – Physics Teacher, 2014
In this paper, we examine a first-year torque and angular acceleration problem to address a possible use of the forelimbs of "Tyrannosaurus rex." A 1/40th-scale model (see Fig. 1) is brought to the classroom to introduce the students to the quandary: given that the forelimbs of "T. rex" were too short to reach its mouth, what…
Descriptors: Physics, Interdisciplinary Approach, Animal Behavior, Science Education
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Bouwma-Gearhart, Jana; Bouwma, Andrew – American Biology Teacher, 2015
The "Next Generation Science Standards" (NGSS Lead States, 2013) recommend that science courses engage communities of students in scientific practices that include building accurate conceptual models of phenomena central to the understanding of scientific disciplines. We offer a set of activities, implemented successfully at both the…
Descriptors: Scientific Concepts, Scientific Literacy, Scientific Principles, Science Activities
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Fergus, Suzanne; Kellett, Kathryn; Gerhard, Ute – Journal of Chemical Education, 2015
Using current research and real-life scenarios to motivate students to understand chemistry principles is a key strategy in learning and teaching. An illustration of psychoactive drugs referred to as "legal highs" used in the U.K. and Europe is presented to highlight key chemistry principles and relate the importance of chemistry…
Descriptors: Chemistry, Science Instruction, Narcotics, Spectroscopy
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Jones, J. C. – Physics Education, 2013
A design exercise in chemical engineering is described which is concerned with thermocouples. Physics is the relevant discipline, a point that was made to the students doing the exercise, and accordingly an account of the exercise for the guidance of teachers and lecturers is presented as a contribution to "Physics Education."
Descriptors: Science Instruction, Scientific Concepts, Measurement Techniques, College Science
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Ibanez, Jorge G.; Puente-Caballero, Rodrigo; Torres-Perez, Jonatan; Bustos, Daniel; Carmona-Orbezo, Aranzazu; Sevilla, Fortunato B., III – Journal of Chemical Education, 2012
A novel procedure for the preparation of electrochromic WO[subscript 3] films from readily available materials is presented. It is based on the electrochemical preparation of potassium tungstate from tungsten filaments of incandescent light bulbs in a potassium hydroxide solution. Tungstic acid is then produced by proton exchange using a…
Descriptors: Science Activities, Inorganic Chemistry, Science Instruction, Energy
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Baseden, Kyle A.; Tye, Jesse W. – Journal of Chemical Education, 2014
Density functional theory (DFT) is a type of electronic structure calculation that has rapidly gained popularity. In this article, we provide a step-by-step demonstration of a DFT calculation by hand on the helium atom using Slater's X-Alpha exchange functional on a single Gaussian-type orbital to represent the atomic wave function. This DFT…
Descriptors: Demonstrations (Educational), Computation, Science Activities, Scientific Concepts
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Glendening, Eric D.; Halpern, Arthur M. – Journal of Chemical Education, 2012
An upper-level undergraduate or beginning graduate project is described in which students obtain the Lennard-Jones 6-12 potential parameters for Ne[subscript 2] and Ar[subscript 2] from ab initio calculations and use the results to express pairwise interactions between the atoms in clusters containing up to N = 60 atoms. The students use simulated…
Descriptors: Science Activities, Science Instruction, College Science, Undergraduate Study
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Kraftmakher, Yaakov – European Journal of Physics, 2012
Nearly two centuries ago, Fourier discovered that any periodic function of period T can be presented as a sum of sine waveforms of frequencies equal to an integer times the fundamental frequency [omega] = 2[pi]/T (Fourier's series). It is impossible to overestimate the importance of Fourier's discovery, and all physics or engineering students…
Descriptors: Undergraduate Study, Science Laboratories, Science Activities, Engineering Education
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