March 25

Chromatography

Prefirst physicists used chromatography to determine the colors that each manufacturer used to create a black pen. We learned that some pens are water soluble while others are not, like Expo and Sharpie. Click here for details of this investigation. We tested some other colors too.

Mrs. Daniel read Purple Green, and Yellow by Robert Munsch and connected reading with science.

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March 25

Light Mixing

Scientists will tell you that red, green, and blue are the primary colors and cyan, magenta, and yellow are the secondary colors. The three primary colors of light mix to make white. Green, red, and blue additive mixing is used in television and computer monitors, including smartphone displays, to produce a wide range of colors.

Are shadows always black? PreFirst and second grade physicists had so much fun investigating my new red, blue, and green flashlights. Click here for order information. Look closely at the shadows. What do you notice? What do you wonder?


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