Maureen Driscoll
Butte High School
MT

I start off the year with Fire Writing Demo. Make a saturated solution of KNO3 (potassium nitrate) - about 100 mL will serve you for several years. Using a Q-tip or small paint brush, I write a message (like Chem Rocks) on a 3-ft long strip of paper towel. Make sure all the letters connect somehow when writing it. (Think Cursive) It will dry and be invisible. Then I tape it to a wall (fortunate...

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