UV Beads Change Color

Clear/pale beads become brightly colored. Ask students to predict what will happen. Move beads from indoor light to UV/sunlight. Key idea: Photochromic molecules change structure under UV light. Ask: What kind of light can we not see but the beads can detect? Safety and cleanup: Use low-power UV flashlight; never shine in eyes. https://www.google.com/search?q=%22UV+Beads+Change+Color%22+science+demonstration+experiment