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Scattering and Absorption of Light The effects of passing light through a colloidal suspension of milk in water and through a solution of copper sulfate are shown.
[#97] The Sweeter Side of DensityMichael Davis and Charles Henry Students determine the density of different sugar solutions and then devise a method for layering them in a graduated cylinder. Dyeing the solutions with food coloring results in a rainbow-colored, heterogeneous mixture. Davis, Michael; Henry, Charles. J. Chem. Educ.2008, 85, 1088A.
Physical Properties |
Solutions / Solvents |
Aqueous Solution Chemistry |
Student-Centered Learning
Soda Can Density and Unexpected ResultsErica K. Jacobsen, Donald R. Paulson, and Michael J. Sanger Reader Donald R. Paulson reports on an unexpected result seen while performing a sink/float test similar to that described in the JCE Classroom Activity "Whatever Floats (or Sinks) Your Can", and describes an extension to the Activity. Activity author Michael J. Sanger and JCE editor-in-chief John W. Moore also discuss possible extensions. Jacobsen, Erica K.; Paulson, Donald R.; Sanger, Michael J. J. Chem. Educ.2008, 85, 18.
Consumer Chemistry |
Physical Properties
Whatever Floats (or Sinks) Your CanMichael J. Sanger Students determine which property of the sodas (caffeine content, soda color, or sugar content) is responsible for whether soft-drink cans float or sink in water. Sanger, Michael J. J. Chem. Educ.2006, 83, 1632A.
Density - Float or Sink A collection of activities that explore basic concepts dealing with density. They are written for the 4-6th grade level.
Physical Properties
Milli?s Super Sorting Challenge In this open-ended activity, students are given the challenge of separating a number of materials, based on their physical properties. This is much like the challenge in sorting garbage for recycling. Students use magnetism, static charge, density and other factors to separate the mix.
Physical Properties
Rooting for Sink and Float A slice of carrot normally sinks in water. In this investigation students attempt to change this by adding salt to the water until it is more dense than the carrot. Will the carrot float? Students use the basic concepts of density to find out.
DensityAmerican Chemical Society ACS Science for Kids activities explore the concept of density and how it can explain when objects float or sink in a liquid.
Physical Properties
DensityEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Physical Properties
Density Lecture DemonstrationsEd Vitz A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
