MR / Schenectady, NY.Yates Arts-in-Education Magnet School (urban elementary school) .Grade 4.Science mentor demonstrates the effect of the extreme cold of liquid nitrogen (generally about -196 degrees Celsius) on a geranium flower in classroom experiment. This image is first in a sequence of three where the blossom is immersed in cup of liquid nitrogen and then shown cracked into pieces as it is slapped against the table. Mentor (materials scientist at research center, full-time working mom) volunteers weekly to demonstrate and explain scientific concepts..Second image in sequence: AD-g4m-4272 or AD-g4m-4274; Third in sequence: AD-g4m-4276 or AD-g4m-4285.MR: g4m.© Ellen B. Senisi