1990 Category Winners in
Chemistry

First Place: J0405

Gravette, William T. Grade 8, San Diego County
Absorbing Freon (A Chlorofluorocarbon)
School: La Jolla Country Day School, La Jolla

Second Place: J0407

Hoggro, Sheree G. Grade 8, Los Angeles County
The Determination of Ascorbic Acid Concentration in Orange Juice Using a Redox Reaction
School: Crozier (George W.) Junior High School, Inglewood

Third Place: J0417

Teegarden, Zoe C. Grade 8, San Diego County
The Effect of Using Mordants with Sunflower Dye
School: Bell (Alexander Graham) Junior High School, San Diego

Honorable Mention: J0402

Dean, Laura E. Grade 8, Los Angeles County
The Determination of Molecular Mass Using the Vapor Density Method
School: Crozier (George W.) Junior High School, Inglewood