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KMID : 1059520130570050640
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Journal of the Korean Chemical Society
2013 Volume.57 No. 5 p.640 ~ p.655
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Analysis of the Level of Cognitive Demands about Concepts of the Changes of State and Kinetic Theory on ‘Science 1’ Textbooks in Junior High School (III)
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Park Ji-Eun
Park Ye-Sul
Kang Soon-Hee
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Abstract
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The purpose of this study is to analyze the cognitive demands level of the description about ‘changes of state’ and ‘kinetic theory’ on the ‘science 1’ textbooks by the 2007 revised curriculum. The three types of curriculum analysis taxonomy have been used to analyze the cognitive demands level of those contents on the 6 kinds of ‘science 1’ textbooks. The most higher level of cognitive demands about the concepts have been discussed here due to the focus of the concepts. The first, the cognitive demand level about ‘three states of substances’ depending on the motion of their particles in 6 textbooks is a early formal operational stage because of using by the application of kinetic theory. The second, the cognitive demand level about ‘diffusion’ and ‘evaporation’ is a early formal operational stage, because the particles move around faster so they can change their position. The third, the cognitive level of the pressure and volume in a gas is a early formal operational stage because of explaining only phenomena in simple correspondence with formal model of kinetic theory. And simple functional relationships beyond linear on the graph of the volume and pressure of gas, the volume and temperature of gas is also a early formal operational stage. The fourth, the cognitive level of the energy of heat by a change of the state is also a early formal operational stage because kinetic theory picture accepted as providing explanation by the change of the state. And functional relationships beyond linear on the graph of the explanation of boiling point of water in water is also a early formal operational stage.
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KEYWORD
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Change of state, Diffusion, Evaporation, Press and volume of gas, Volume and temperature of gas
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