Volume/Issue :

Article type :

Case study

Page No :

29-37

Abstract :

The article reveals the importance of demonstration tasks in physics teaching in secondary schools. Four demonstration of the liquid and gas properties are presented and analyzed. They are: Pressure dependence of gas flow speed; Pressure reduction in air-stream; Wing lift; Liquid surface tension. Reasoning schemes for giving a logical sense to these physics demo tasks are developed. The proposed reasoning schemes reach to activate students' thinking, understanding the demonstrations during the observed physical phenomena, i.e. help students to: understand the nature of the demo task, determine cause - effect relationships and dependencies, compare conditions and findings, summarize the results, do conclusions. Such using of demonstration tasks is useful to both of teacher and pupil: teacher controls the content of teaching and a learning of pupils, pupils - are focused to self-activities, encouraged to think, analyze, summarize and do conclusions.

Keywords :

physics teaching, demonstration task, liquid and gas properties, reasoning schemes

References :

Buncick M. C., Betts P. G., Horgan D. D. (2001). Using demonstrations as a contextual road map: enhancing course continuity and promoting active engagement in introductory college physics. International Journal of Science Education, Volume 23, Number 12, pp. 1237–1255(19).
Etkina E., Van Heuvelen A., Brookes D. T., Mills D. (2002). Role of experiments in physics instruction–a process approach. The Physics Teacher, Vol.40, No. 6, September, pp. 351–355.
Crouch C., Fagen A.P., Callan J.P., Mazur E. (2004). Classroom demonstrations: Learning tools or entertainment? American Journal of Physics, Volume 72, Issue 6, pp. 835–838.
Šlekienė V., Ragulienė L. (2009). Vaizdumo principo realizavimas fizikos demonstraciniais bandymais. Gamtamokslinis ugdymas. Nr. 2 (25). p. 38–45.
Šlekienė V., Ragulienė L. (2009). Vaizdumo principo realizavimas mechanikos demonstraciniais bandymais mokant(is) fizikos XI klasėje. Gamtamokslinis ugdymas. Nr. 3 (26). p. 29–37.
Селиверстов А. В., Дунин М. С. (2002). Использование устройств видеозахвата в лекционном эксперименте по физике. Физическое образование в вузах. Т. 8, № 3.
Семенов М. В., Якута А. А. (2002). Измерение ускорения свободного падения баллистическим методом в рамках демонстрационного эксперимента. Физическое образование в вузах. T. 8, № 3.

Cite as :

Šlekienė, V., & Ragulienė, L. (2010). Skysčių ir dujų savybių demonstraciniai bandymai ir jų loginis įprasminimas [Demonstration tasks of liquid and gas properties and their rationale sense]. Gamtamokslinis ugdymas / Natural Science Education, 7(1), 29-37. https://doi.org/10.48127/gu-nse/10.7.29