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Journal Articles: 15 results
[#97] The Sweeter Side of Density  Michael 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 Results  Erica 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 Can  Michael 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.
Consumer Chemistry |
Physical Properties |
Nonmajor Courses
Bowling for Density!  Kathleen Holley, Diana S. Mason, and Kirk Hunter
Students are to decide whether or not an assigned bowling ball will float or sink in water. They must make their prediction based on a mathematical determination, as they are not permitted to place the bowling ball in water until it is time to test their hypotheses.
Holley, Kathleen; Mason, Diana S.; Hunter, Kirk. J. Chem. Educ. 2004, 81, 1312A.
Physical Properties
Discrepant Event: The Great Bowling Ball Float-Off  Diana S. Mason, William F. Griffith, Sharon E. Hogue, Kathleen Holley, and Kirk Hunter
The concept of density is central to the study of science. Because of its importance, density is one of many physical properties that are studied in first-year chemistry and physical science courses. Determining the density of a solid or liquid is a routine laboratory activity in these classes, and is easily adapted to inquiry-based methods. In this activity students are to decide whether an assigned bowling ball will float or sink in water. They must make their predictions based on a mathematical determination, as they are not permitted to place the bowling ball in water until it is time to test their hypotheses. Students gain practice in various measurement techniques as well as calculations involving significant digits, unit conversions, and geometry formulae.
Mason, Diana S.; Griffith, William F.; Hogue, Sharon E.; Holley, Kathleen; Hunter, Kirk. J. Chem. Educ. 2004, 81, 1309.
Nonmajor Courses |
Physical Properties
Rethinking the Classroom Laboratory  Diana S. Mason
Do you have an idea, activity, vision to share with our readers? Find out more about submitting JCE Classroom Activities. Direct laboratory experience is one of the best ways to bring home lessons and have meaningful learning experiences. The Journal not only publishes interesting articles and tested activities but it also shares tidbits of information that might be lost to obscurity if not recorded.
Mason, Diana S. J. Chem. Educ. 2004, 81, 1241.
Physical Properties |
Administrative Issues |
Conferences
The Physical Reality of Molecules: They're Dense and They Move Around!  Silverstein, Todd P.
Diffusion of ink in water as it is heated to illustrate density and the atomic/kinetic theory.
Silverstein, Todd P. J. Chem. Educ. 1995, 72, 177.
Physical Properties |
Kinetic-Molecular Theory
Gas reactions in plastic bags: Relating laboratory observations to the atomic-molecular model  Robinson, Maurice; Barrow, Gordon M.
Carrying out chemical reactions in Ziplock bags to investigate a variety of chemical concepts.
Robinson, Maurice; Barrow, Gordon M. J. Chem. Educ. 1992, 69, 1026.
Kinetic-Molecular Theory |
Gases |
Reactions |
Acids / Bases |
Oxidation / Reduction |
Photochemistry |
Atmospheric Chemistry |
Physical Properties
Floating versus sinking   Pool, Gary L.
An assignment is offered for students to explore density of objects as they sink and float.
Pool, Gary L. J. Chem. Educ. 1992, 69, 59.
Physical Properties
Method for separating or identifying plastics  Kolb, Kenneth E.; Kolb, Doris K.
This article suggests the use of differences in density as a means for separation and identification of plastics.
Kolb, Kenneth E.; Kolb, Doris K. J. Chem. Educ. 1991, 68, 348.
Consumer Chemistry |
Green Chemistry |
Physical Properties
A hands-on introduction to chemistry for gifted students in the intermediate grades  Greco, Thomas G.; Greco, Catherine B.
Experiments involving density, metals and acids, acids and indicators, pH, neutralization reactions, and analytical chemistry in the kitchen for upper elementary students.
Greco, Thomas G.; Greco, Catherine B. J. Chem. Educ. 1987, 64, 537.
Physical Properties |
pH |
Metals |
Acids / Bases |
Dyes / Pigments |
Reactions |
Consumer Chemistry
An exhibition on everyday chemistry: Communicating chemistry to the public  Ucko, David A.; Schreiner, Rodney; Shakhashiri, Bassam Z.
A recent addition to a large urban museum aids in the efforts to better educate the public about the role of chemistry in their lives.
Ucko, David A.; Schreiner, Rodney; Shakhashiri, Bassam Z. J. Chem. Educ. 1986, 63, 1081.
Acids / Bases |
Applications of Chemistry |
Periodicity / Periodic Table |
Photochemistry |
Physical Properties |
Reactions
Density demonstration using diet soft drinks  Checkai, Gary; Whitsett, John
Separation of particles by using a density gradient has always been a difficult concept for students to grasp. Most suggested demonstrations require long preparation and use materials unfamiliar to the students. This demonstration suggests an improved method.
Checkai, Gary; Whitsett, John J. Chem. Educ. 1986, 63, 515.
Physical Properties
A unique demonstration show for the elementary school classroom  Waterman, Edward L.; Bilsing, Larry M.
Utilizing a unique program of short term professional leaves, these authors developed and presented a series of chemical demonstration shows for elementary school children. The major goal of the program was to kindle interest and instruct students in chemistry though motivational illustrations of chemical and physical phenomenon.
Waterman, Edward L.; Bilsing, Larry M. J. Chem. Educ. 1983, 60, 415.
Physical Properties |
Reactions
A visual aid in learning the principle behind determining the density of irregularly shaped objects  Meloan, Cliff E.
Using clay to demonstrate that mass loses weight when suspended in water, and the same mass loses the same amount of weight, regardless of its shape.
Meloan, Cliff E. J. Chem. Educ. 1980, 57, 791.
Physical Properties