![]() ![]() Phosphors give off visible light after being energized. That means they contain special substances called phosphors. Glow-in-the-dark toys have phosphorescence. What about glow-in-the-dark toys? Have you ever seen yo-yos, stickers, and stars that glowed in the dark? They can turn any dark room into a magical world of adventure! Have you ever seen a watch whose numbers glow in the dark? It was radioluminescent! That means they contain an element like radium that gives off light. That means they glow because of a chemical reaction. ![]() Have you ever seen a glow stick? These are popular at many nighttime summer activities, like festivals and campfires. They glow for protection, camouflage, or to attract mates.Īnimals aren’t the only things that glow in the dark. And fireflies aren’t alone! Other animals with this trait include jellyfish, glowworms, and anglerfish. That means they naturally contain a chemical that makes them light up. After all, what other bug lights up? Many people spend summer nights watching fireflies and WONDERing how they manage to glow in the dark.įireflies glow because they are bioluminescent. The firefly, also known as the lightning bug, is a magical creature for many kids. The season of ice cream and popsicles! What else represents summer for you? Sunglasses? Picnic baskets? How about bugs? It’s true, many bugs like to enjoy the warmth of summer! But no bug represents summer quite like the magical firefly. Finally, summer! A time for swimming pools and cookouts.
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