• 3-5: 4F/E3. Light travels and tends to maintain its direction of motion until it interacts with an object or material. Light can be absorbed, redirected, bounced back, or allowed to pass through.
• 6-8: 4F/M1. Light from the sun is made up of a mixture of many different colors of light, even though to the eye the light looks almost white. Other things that give off or reflect light have a different mix of colors.
• 6-8: 4F/M2. Something can be "seen" when light waves emitted or reflected by it enter the eye—just as something can be "heard" when sound waves from it enter the ear.
• 6-8: 4F/M5. Human eyes respond to only a narrow range of wavelengths of electromagnetic waves-visible light. Differences of wavelength within that range are perceived as differences of color.

• 6-8: 11B/M5. The usefulness of a model depends on how closely its behavior matches key aspects of what is being modeled. The only way to determine the usefulness of a model is to compare its behavior to the behavior of the real-world object, event, or process being modeled.
• 9-12: 11B/H3. The usefulness of a model can be tested by comparing its predictions to actual observations in the real world. But a close match does not necessarily mean that other models would not work equally well or better.
• 9-12: 11B/H5. The behavior of a physical model cannot ever be expected to represent the full-scale phenomenon with complete accuracy, not even in the limited set of characteristics being studied. The inappropriateness of a model may be related to differences between the model and what is being modeled.

Did you know that the three primary colors of light are red, green, and blue (not yellow).  In this unique, award-winning unit on color, students investigate why the traditional color wheel cannot be applied to human perception of color.  They will learn how objects  absorb one or more colors of light to produce the dazzling array of colors we see with our eyes.  **NOTE: The unit was developed for use with a set of unique hands-on lab materials, which may be purchased at low cost from the publisher.

• Physical Sciences K-8 Visible Light and Color Unit
• Physics First Visible Light and Color Unit

Instructional Unit                                                                 Grades 8-12
In this unique, award-winning unit on color, students discover that the primary colors of light are red, blue, and green, different from those they learned in the traditional color wheel.  They will also investigate how objects absorb one or more colors of light to produce the dazzling array of colors we see with human vision.  **NOTE: The unit was developed for use with a set of unique hands-on lab materials, which may be purchased at low cost from the publisher.

• Conceptual Physics Visible Light and Color Unit
• Algebra-Based Physics Visible Light and Color Unit