Mr. Wizard's World

Ash, Moldy Bread, Oscilloscope Sugar Crystals, Underwater Park and Radiometer and more (3x2)

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Ash Minerals, Mold, Oscilloscope Timer, Sugar Crystals, What is This, Spool Roll, Underwater Park, Radiometer Challenge. ASH MINERALS - Michael holds a piece of newspaper with tongs over a candle. After the paper has burned, Mr. Wizard explains what is left behind are the minerals. MOLD - This invasion can start from one tiny spore, so small it's invisible.