Emphasis Preaching Journal
Science teachers interest and entertain...
Illustration
Science teachers interest and entertain even bored students when they turn on the black
light. A black light makes many substances appear to be different. It even makes some
rocks glow. The appearance of common materials often interests students more than
glowing crystals. Club soda becomes blue-white under black light. An additive to
antifreeze helps police reconstruct an accident scene from antifreeze puddles.
