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Peer reviewed
Christman, Robert A. – Journal of Geological Education, 1980
Described is a method of studying growing crystals in a classroom utilizing a carrousel projector standing vertically. A saturated salt solution is placed on a slide on the lens of the projector and the heat from the projector causes the water to evaporate and salt to crystalize. (Author/DS)
Descriptors: Audiovisual Aids, Chemistry, Crystallography, Demonstrations (Educational)
Peer reviewed
Cawthorn, Richard Grant – Journal of Geological Education, 1991
The principles of magma addition and liquid layering in magma chambers can be demonstrated by dissolving colored crystals. The concepts of density stratification and apparent lack of mixing of miscible liquids is convincingly illustrated with hydrous solutions at room temperature. The behavior of interstitial liquids in "cumulus" piles…
Descriptors: Chemistry, College Science, Demonstrations (Educational), Density (Matter)