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Analysis of Elementary and Secondary Students’ Conceptions about Buoyant Force
Jaesuk Rhee · Bongwoo Lee ∗
Department of Science Education, Dankook University, Gyeonggi 448-701 (Received 27 August 2009, in final form 7 January 2010)
The purpose of this study was to analyze students’ understanding about buoyant force. We asked 309 students three questions about buoyant force: movement of wood under the surface of water, the force causing wood to float in water, and Archimedes’ crown problem. The results from this study were as follows: First, most students knew the buoyant force, but few students could explain the movement of matter in water as being due to the sum of the buoyant force and gravity.
Second, many students answered that the buoyant force was bigger than gravity when the matter was floating in water. Third, many students answered that the rising of an object to the surface of water was due to density. The buoyant force needed to be explained in a force-movement context if it is to be understood more clearly.
PACS numbers: 01.40.Ej
Keywords: Buoyant force, Elementary school students, Secondary school students, Concept understanding
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