Things That Glow Hot> I get my share of glowing reviews. But even I applaud a dazzling show of glowing lava.
Lava is very hot, melted rock. So hot that some of its heat energy turns into light <#5376,19><!energy> and makes it glow. Lava can glow red, orange, or yellow. The color of the light it gives off changes the hotter the lava gets. “Yellow hot” is hotter than “red hot.” Some metals (like you might find in a horseshoe) can glow so hot they’re almost white - “white hot”.
Electricity can heat things up and make them glow, too. Electric current heats the metal filament (coil) inside a light bulb. The filament glows very brightly. You see the light. You can even feel the heat that made the light. (Place a hand near, but never on, a light bulb.)
Lots of things can get hot enough to glow and become a source of light. Right away, I think of candles, barbecue coals, molten steel at a car factory, molten glass being blown into a vase . . . What else can you think of?
