期刊名称：Eurasia Journal of Mathematics, Science & Technology Education
印刷版ISSN：1305-8223
电子版ISSN：1305-8223
出版年度：2018
卷号：14
期号：7
页码：3109-3122
DOI：10.29333/ejmste/91664
出版社：Pamukkale Univ Dept Sci Education
摘要：This study focuses on the misconceptions of eighth-grade students in the Arab sector
compared to the Jewish sector regarding the conservation of mass during combustion
in a closed system and in an open system before the subject is taught, and to what
extent the misconceptions change after it is taught. Students (N=195) from six
heterogeneous classes were asked to fill in a ten-question questionnaire twice: once
before the subject was taught and again afterwards. The findings indicated that
students’ understanding improved more with respect to closed systems compared with
open systems; before the subject had been taught the situation was very similar for
both cases. The students’ explanations were based on visual arguments and showed
that there was confusion concerning the effect of chemical, physical, and state of
matter changes on the conservation of mass during combustion. Regarding the
comparison between the conceptions of eighth-grade students in the Arab and Jewish
(N=105) sectors, students in the Arab sector had better achievements in closed
systems, whereas Jewish students gave more correct answers to questions in open
systems. The study’s findings can help middle-school students and their teachers
understand that physical and chemical changes do not affect mass in a closed system,
and that students should learn to distinguish between conservation of mass in open
and in closed systems.
关键词：chemical changes; combustion; mass conservation; misconceptions;
physical changes
