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Can Crystals Show Color Mixing? (page 2)

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Author: Michael Calhoun

Research Questions

  • What are hydrogel crystals?
  • What are the primary colors? 
  • What did you see when the different colored crystals touched each other? Why do you think this happened?
  • How many different colors did you produce? How did the crystals feel?
  • What color appeared when the following colored crystals were mixed: Red and yellow? Blue and yellow? Red and blue?
  • How could you make purple, orange, or green? 

Important Terms and Concepts

Primary color, secondary colors, hydrogel crystal, diffusion, and color wheel

Experimental Procedure

  1. Setup three cups. Fill each cup half full of water. Add a few drops of blue coloring to the first cup, yellow to the second cup, and red food coloring to the third and stir.
  2. Add hydrogel crystals to each cup and let stand 20 minutes or until they cannot be clearly seen in the colored water.
  3. Sieve the mixtures. It is best to do this over a large container rather than the sink in case some of crystals spill out of the sieve.
  4. Combine several of different colors (in layers) in a tall slender empty water bottle or make a huge rainbow wand using a plastic fluorescent tube casing and watch the colors melt into each other. Record the color combinations in a table similar to the one shown below.
  5. Repeat the same procedure mixing different color combinations
  6. To reuse the crystals, lay them on a paper towel and let dry over a few days. They may stain beneath the towel, so add a layer of aluminum foils.            

Individual Crystal Color Additions

                         Combined Crystal Color

Red

    Blue
    Yellow
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Bibliography

Title: Growing Crystals, Author: Ann O Squire, Publisher: Children's Press, ISBN-10: 0516269844 and ISBN-13: 978-0516269849  

This paperback book describes how to grow crystals. It is ideal for today's young investigative reader this book includes lively sidebars, a glossary and index, plus a comprehensive “To Find Out More” section listing books, organizations, and Internet sites.  

Title: The Color Mixing Bible, Author: Ian Sidaway, Publisher: Watson-Guptill, ISBN-10: 0823007235 and ISBN-13: 978-0823007233 

This book provides a basic color palette for each art medium, demonstrating an array of color mixes, as well as offering full explanations of various paints and pigments. This invaluable guide features scores of tips and techniques for color mixing with oils, acrylics, watercolors, inks, pastels, food coloring, and virtually every other art medium. It also includes in-depth information on how to determine the opacity and strength of a color, and hundreds of color illustrations make everything simple. The material in the book is comprehensive, adult-level in scope and sequence however; the young investigator and his or her parents (teachers) can use this book as a general reference resource.

Note: The Internet is dynamic; websites cited are subject to change without warning or notice!

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