What makes one firework glow red and another blue? Different combinations of chemicals are incorporated to give Fourth of July fireworks their brilliant colors
What exactly gives fireworks their colors? According to Nathaniel Finney, senior lecturer in North Carolina State’s Department of Chemistry, fireworks get their brilliant colors from different metal salts heated to high temperatures.
Lithium and strontium salts emit red light.
Sodium salts are used to create yellow light.
Calcium salts are used for orange light.
Copper salts, despite the name, emit blue, not copper, light.
Barium salts glow with a green light.
Winter stifles pollen, but other pests can make allergies worse now
Most people don't consider allergies the cause of their coldlike symptoms in the winter, because the cause of most respiratory allergies — pollen — is usually not drifting about in cold and snowy climes. Yet some of the most common allergies are to indoor things.
Avenger an American value
If you’re someone who appreciates the golden age of domestic sedans — those big, comfortable, heavy-feeling cars with a uniquely American sense of style — this one ought to pique your interest.
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