indicator

315

These flowers can tell us something important about the place they are growing. What is it?

460

Often, as you watch a fireworks display, you will see a large burst that starts as one color, and then the entire burst changes to a different color. How do they do that?

Fireworks Colors

Fireworks play a role in many holidays and celebrations. Have you ever wondered how they get the different colors into the fireworks? If you want yellow fire, do you add yellow paint to the mixture? No, that would not work. Instead, you need something that will burn with a yellow flame. Yellow flames are fairly common, but what about green flames or purple flames?

Pages