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MR / Schenectady, NY.Yates Arts-in-Education Magnet School (urban elementary school) .Grade 4.Students watch chemical reaction with liquid nitrogen in combination science experiment and cooking demonstration by science mentor in classroom. Liquid nitrogen (generally about -196 degrees Celsius) is added to ingredients (heavy cream, sugar, vanilla extract) to freeze them immediately to make ice cream that the students will eat. Mentor (materials scientist at research center, full-time working mom) volunteers weekly to demonstrate and explain scientific concepts..MR: g4m, Lat5.© Ellen B. Senisi