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Everyday Science in middle school: Floating and sinking concepts

journal contribution
posted on 06.12.2017, 00:00 by Teresa MooreTeresa Moore, Allan HarrisonAllan Harrison
Why do corks always float, lead sinkers sink but clothes pegs both float and sink? This inquiry unit explored these questions and is suitable for upper primary and lower secondary students. The unit comprised sequenced activities culminating in the students making and explaining a working Cartesian Diver. The learning aim was to develop a causal explanation for floating in which students understood floating in terms of balanced forces. Data came from classroom observations and a discourse analysis of the Cartesian diver activity. The unit explored prior knowledge of floating and sinking, introduced new phenomena demonstrating balanced/unbalanced forces and emphasised "working scientifically". The study found that a range of alternative conceptions survived alongside a set of scientifically acceptable explanations on different students. This indicates the presence of multiple subjectivities, deep-seated informal alternative discourses and some formal scientific discourses. Students can develop relational explanations for abstract phenomena but need time and guidance.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

21

Issue

1

Start Page

49

End Page

68

Number of Pages

20

ISSN

0726-416X

Location

Albert Park, Vic

Publisher

James Nicholas

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Faculty of Arts, Humanities and Education;

Era Eligible

Yes

Journal

Curriculum and teaching.