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The Impact of Physical Molecular Models on Students' Visuo-Semiotic Reasoning Skills Related to the Lewis Structure and Ball & Stick Model of Ammonia
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Nkosi, Thobile; Mnguni, Lindelani – Journal of Baltic Science Education, 2020
Visuo-semiotic models, such as Lewis structures and ball & stick models, are widely used to enhance students' learning. However, there is limited research about the impact of these models on specific visuo-semiotic reasoning skills. In the current research, we aimed to determine the extent to which physical molecular models could enhance…
Descriptors: Foreign Countries, Molecular Biology, Molecular Structure, Models
Modelling Students' Visualisation of Chemical Reaction
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Cheng, Maurice M. W.; Gilbert, John K. – International Journal of Science Education, 2017
This paper proposes a model-based notion of "submicro representations of chemical reactions". Based on three structural models of matter (the simple particle model, the atomic model and the free electron model of metals), we suggest there are two major models of reaction in school chemistry curricula: (a) reactions that are simple…
Descriptors: Science Instruction, Chemistry, Scientific Concepts, Models
Associating Animations with Concrete Models to Enhance Students' Comprehension of Different Visual Representations in Organic Chemistry
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Al-Balushi, Sulaiman M.; Al-Hajri, Sheikha H. – Chemistry Education Research and Practice, 2014
The purpose of the current study is to explore the impact of associating animations with concrete models on eleventh-grade students' comprehension of different visual representations in organic chemistry. The study used a post-test control group quasi-experimental design. The experimental group (N = 28) used concrete models, submicroscopic…
Descriptors: Organic Chemistry, Animation, Models, Visual Aids
The Effect of Different Molecular Models on High School Students' Conceptions of Molecular Genetics
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Rotbain, Yosi; Stavy, Ruth; Marbach-Ad, Gili – Science Education Review, 2008
Our main goal in this study was to explore whether the use of models in high school molecular genetics instruction can contribute to students' understanding of concepts and processes in genetics. Three hundred and nineteen students from four comparable groups of 11th- and 12th-grade students participated. The control group (116 students) was…
Descriptors: Molecular Structure, Models, High School Students, Genetics
The Role of Submicroscopic and Symbolic Representations in Chemical Explanations
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Treagust, David F.; Chittleborough, Gail; Mamiala, Thapelo L. – International Journal of Science Education, 2003
Chemistry is commonly portrayed at three different levels of representation--macroscopic, submicroscopic and symbolic--that combine to enrich the explanations of chemical concepts. In this article, we examine the use of submicroscopic and symbolic representations in chemical explanations and ascertain how they provide meaning. Of specific interest…
Descriptors: Grade 11, Chemistry, Science Instruction, Molecular Structure
Effect of Bead and Illustrations Models on High School Students' Achievement in Molecular Genetics
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Rotbain, Yosi; Marbach-Ad, Gili; Stavy, Ruth – Journal of Research in Science Teaching, 2006
Our main goal in this study was to explore whether the use of models in molecular genetics instruction in high school can contribute to students' understanding of concepts and processes in genetics. Three comparable groups of 11th and 12th graders participated: The control group (116 students) was taught in the traditional lecture format, while…
Descriptors: Illustrations, Grade 12, Genetics, Science Achievement