Chemistry professor Bassam Shakhashiri explains to special guest Bucky Badger why condensed water vapor is produced when hot water is poured on dry ice during his "Once Upon a Christmas Cheery in the Lab of Shakhashiri" program, an annual holiday version of his "Fun with Science" program. Image credit: Stephanie Judge Photo date: December 2001

	Chemistry professor Bassam Shakhashiri explains why condensed water vapor is produced and liquids change color when dry ice is dropped into cylinders during his "Once Upon a Christmas Cheery in the Lab of Shakhashiri" program, an annual holiday version of his "Fun with Science" program. Image credit: Stephanie Judge Photo date: December 2001
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