International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2569

Full Length Research Paper

Teaching the effect of variables on the brightness of a light bulb in a simple electrical circuit using a pneumatic system model (PSM)

Gonca Harman
  • Gonca Harman
  • Faculty of Education, Science Education Program, Ondokuz May?s University, Samsun, Turkey.
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Aytekin Cokelez
  • Aytekin Cokelez
  • Department of Humanities and Social Sciences, Istanbul Technical University, Istanbul, Turkey.
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  •  Received: 17 December 2014
  •  Accepted: 23 February 2015
  •  Published: 30 March 2015

Abstract

An experiment-based analogical pneumatic system model (PSM) was developed in this study for the purpose of teaching 5th grade students (11 years old) the variables that have an effect on the brightness of a light bulb in a simple electric circuit. Understanding the analogical relationship between source and target in teaching the variables that have an effect on the brightness of a light bulb in a simple electric circuit using a PSM. Understanding the analogical relationship between the effect on the brightness of a light bulb when the number of light bulbs is kept fixed but the number of batteries is increased and the effect on the size of an inflated balloon and the distance traveled by the rocket balloon when the number of balloons is kept fixed but the cycle of the air pump is increased. Understanding the analogical relationship between the effect on the brightness of a light bulb when the number of batteries is kept fixed but the number of light bulbs is increased and the effect on the size of the inflated balloon and the distance traveled by the rocket balloon when the cycle of the air pump is fixed but the number of balloons is increased.

 

Key words: Brightness of a light bulb, a simple electrical circuit, pneumatic system model (PSM).