MR / Schenectady, NY.Yates Arts-in-Education Magnet School (urban elementary school) .Grade 4.Students watch chemical reaction in graduated cylinder in experiment set up by science mentor (materials scientist at research center, full-time working mom) in their classroom. Here, a basic solution is being converted to an acidic solution as carbon dioxide [dry ice] is added to a base (ammonia in water [Windex ®]) .to create carbonic acid. .Boy foreground (9) uses pencil to probe resulting substance..MR: g4m, Czu2.© Ellen B. Senisi