Blowing up a balloon with baking soda and vinegar involves pouring the baking soda in the balloon, pouring the vinegar in a bottle and stretching the mouth of the balloon over the bottle, dumping the baking soda into the vinegar and releasing carbon dioxide gas. Fill up a balloon using common household ingredients with a demonstration from a science teacher in this free video on science. Expert: Colin Kilbane Contact: www.madscience.org/locations/mn/ Bio: Colin Kilbane is the head scientist of a school program called Mad Science. Filmmaker: Ryan Ouradnik
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www.youtube.com www.youtube.com Gingersnaps: In the bowl of your electric mixer (or with a hand mixer), beat the butter and sugars until light and fluffy (about 2 – 3 minutes). Add the molasses, egg, and vanilla extract and beat until incorporated. In a separate bowl whisk together the flour, baking soda, salt, and spices. Add to the butter mixture and mix until well combined. Cover and chill the batter for about 30 minutes. Preheat the oven to 350 degrees F (180 degrees C). Line two baking sheets with parchment paper. Place about 1 cup (200 grams) of white granulated sugar in a medium sized bowl. When the dough has chilled sufficiently, roll into 1 inch (2.54 cm) balls. Then roll the balls of dough into the sugar, coating them thoroughly. Place on the baking sheet, spacing about 2 inches (5 cm) apart and, with the bottom of a glass, flatten the cookies slightly. Bake for about 12 – 15 minutes or until the cookies feel dry and firm on top. (The longer the cookies bake, the more crisp they will be.) Cool on a wire rack. Makes about 4 dozen cookies.