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Phosphors

March 6, 2011 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.

Phosphors that are Phosphorescent vs. Phosphors that are Fluorescent A phosphor is a chemical substance that when energized with certain types of light energy emits visible light. Some phosphors can be energized with visible light, but all phosphors can be energized with ultraviolet rays (a.k.a. ultraviolet radiation or ultraviolet light). NOTE: Phosphors may or may [...]

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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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