Abstract
Traditional methods used to teach the concept of density that employ solid objects ofdifferent masses and volumes can be supplemented by enquiry activities in which studentsvary the mass-to-volume ratio of the same object to test ideas about density andflotation. A simple substance, Blu-Tack, is an ideal material to use in this case.The activity introduced in this article not only allows students to explore theeffect of air on the density and flotation of an object, but also stimulates them torelate a macroscopic property such as density to the microscopic structure ofmatter.
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