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In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red.

Do you have a hard time matching paint swatches with your furniture? When you consider human perception, color is context dependent.

Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.

In this activity, learners will explore how different colors of lights interact with objects around them. Will a blue object stay blue with a red filter?