Let’s Repair the Broken Galileo Thermometer

  • Marián Kireš Section of Physics Education Institute of Physics Faculty of Science P.J.Šafárik University in Košice


We have developed and verified laboratory work as guided inquiry for upper secondary level students, focusing on conceptual understanding of the physical principle that forms the basis of temperature measurement,
and on improvement of selected skills. Conceptual pre-test questions initiate the students’ interest and help identify input misconceptions. Using the method of interactive lecture demonstration, the students are introduced to the measurement principles of the Galileo thermometer. The students are then set the problem of how to repair a broken thermometer when tap water is used instead of ethanol. Since the density of water is greater than that of ethanol, the buoys must be adjusted by the students to achieve correct temperature measurement. The next steps of the activity have a hands-on orientation. The students work in pairs, guided by worksheet instructions. At the end of the activity, they complete self-assessment rubrics focused on skill improvement and final conceptual understanding. The results of the conceptual pretest questions and of the self-assessment rubrics from 461 participants are analysed and recommendations are made for teachers.


Abd-El-Khalic, F., & Lederman, N. (2000). Improving science teachers’ conceptions of nature of science:
a critical review of the literature. International Journal of Science Education, 22(7), 665–701.

European Commission (EC), & High level group on science education (2007). Science education
NOW: A renewed pedagogy for the future of Europe (EUR 22845). Brussels: DG Research.

Güémez, J. et al. (2009). Toys in physics lectures and demonstrations—a brief review. Physics Education,
44(1), 53–64.

IAP – International Conference (2010). Taking inquiry - Based science education into secondary education
in management decision. Retrieved from http://www.interacademies.org/15266/Taking-inquirybased-

Nickas, G. D. (1989). A thermometer based on Archimedes’ principle. American Journal of Physics,
57(9), 845–846.

Reeves, T. C. (2006). Design research from the technology perspective. In J. V. Akker, K. Gravemeijer,
S. McKenney, & N. Nieveen (Eds.), Educational design research (pp. 86–109). London, UK: Routledge.

Roehrig, Gillian H., & Luft, J. A. (2004). Constraints experienced by beginning secondary science
teachers in implementing scientific inquiry lessons. International Journal of Science Education, 26(1),

Sadler, T. D., Amirshokoohi, A., Kazempour, M., & Allspaw, K. M. (2006). Socioscience and ethics in
science classrooms: Teacher perspectives and strategies. Journal of Research in Science Teaching, 43(4),

Ucke, C., & Schlichting, H. J. (2017) Galileo chain thermometer. Physics Education, 52(4), 045012.
Zion, M., Cohen, S., & Amir, R. (2007). The spectrum of dynamic inquiry. Research in Science Education,
37(4), 423–447.
How to Cite
KIREŠ, Marián. Let’s Repair the Broken Galileo Thermometer. Center for Educational Policy Studies Journal, [S.l.], v. 8, n. 1, p. 77-95, mar. 2018. ISSN 2232-2647. Available at: <https://ojs.cepsj.si/index.php/cepsj/article/view/320>. Date accessed: 20 apr. 2018. doi: https://doi.org/10.26529/cepsj.320.