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Classification of Beads

April 26, 2010 By
classification bead mixture

Classification is a term used for organizing things, such as plants and animals, rocks and minerals, or the pony beads used in this activity. First prepare a mixture of beads for each group of 4 to 5 kids. The mixtures do not have to be exactly the same, but each group should include the following: [...]

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Phosphors

April 24, 2010 By
The smiley face on the hand is drawn with a substance containing a phosphor, such as Vasoline (petroleum jelly). Under a black light the phosphors glow.

Why Do Somethings Glow In the Dark? A phosphor is a chemical substance that when energized radiates (emits, gives off) visible light. NOTE: Phosphors may or may not contain the phosphorus element. Scientists have created thousands of different kinds of phosphors. Phosphors differ in: 1. The type of energy that is needed to energize them. [...]

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