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Peer reviewedCoffman, Joy; Tanis, David O. – Science Teacher, 1990
Presented is an analogy that can be used to explain the particle theory of matter. The three phases of matter are represented by preschoolers, yuppies, and senior citizens. The value of using analogies is discussed. (KR)
Descriptors: Atomic Theory, Chemistry, Diffusion (Physics), Kinetic Molecular Theory
