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The Physics Teacher: The Four States of Matter—Solid, Squishy, Liquid, and Gas
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Abstract
The featured article offers several demonstrations of substances that seem to be neither solid nor liquid, but somewhere in between. The authors suggest laboratory experiments that can be performed by beginning physics students, and suggest theoretical explanations for the strange viscosity behaviors. The subject is chemistry much more than physics, and it may require chemistry textbook authors to rethink the popular definitions of physical and chemical change. This reviewer then comments on the historical origins of squishiness, and on its unfortunate neglect, in their author's opinion, by general chemistry texts. The subject is properly called rheology, and is of considerable significance to industrial chemists.
Keywords (Audience):
High School / Introductory ChemistryKeywords (Feature):
Reports from Other JournalsKeywords (Pedagogy):
Textbooks / Reference BooksKeywords (Subject):
Phases / Phase Transitions / DiagramsCiting Articles
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This article has been cited by 1 ACS Journal articles (1 most recent appear below).
Logic Lessons Lost
Roy W. ClarkJournal of Chemical Education2010 87 (9), 901-902Logic Lessons Lost
Roy W. ClarkJournal of Chemical Education2010 87 (9), 901-902This commentary piece contains two criticisms of textbook definitions. One is the old definition of element (cannot be separated into...), to the correct definition (a class of atoms with the same atomic number). The second criticism concerns the correct ...
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- Received: August 03, 2009
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