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ERIC Number: EJ1074394
Record Type: Journal
Publication Date: 2015-Sep
Pages: 4
Abstractor: As Provided
ISSN: ISSN-0021-9584
The Dynamic Density Bottle: A Make-and-Take, Guided Inquiry Activity on Density
Kuntzleman, Thomas S.
Journal of Chemical Education, v92 n9 p1503-1506 Sep 2015
An activity is described wherein students observe dynamic floating and sinking behavior of plastic pieces in various liquids. The liquids and solids are all contained within a plastic bottle; the entire assembly is called a "density bottle". After completing a series of experiments that guides students to think about the relative densities of both the liquids and solids in the bottle, students are able to explain the curious floating and sinking phenomena. As a part of the activity, students construct their own bottles and are encouraged to describe to others how the density bottle works. These bottles can be constructed using inexpensive and easily obtained materials. The level of inquiry involved in the activity can be tailored to meet the particular interests and needs of students. Modifications to the density bottle, including an engaging one that uses LEGO pieces, are discussed.
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive; Guides - Classroom - Teacher
Education Level: Elementary Secondary Education; Higher Education
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A