Week 5: November 10th, 2010

3rd Grade Group:

Today we were able to see the results of our crystal gardens that we started last week and further delve into the science of crystallization. After examining the crystal gardens, an example of slow-growth crystals, we began an experiment with fast crystallization. We used dissolved epsom salts and a little glue into boiling water, and then painted this solution onto the sides of glass jars and construction paper.  After the liquid evaporated, each girl was left with a beautiful piece of crystallized art!

4th/5th Grade Group:

The 4th and 5th graders explored the properties of carbon dioxide. First, we learned how to "magically" blow up a balloon using the carbon dioxide produced by a packet of instant yeast. Our second trick of the day was to extinguish a flame by "pouring" carbon dioxide onto a candle.  We mixed baking soda and vinegar together in a cup to produce carbon dioxide. We then carefully tilted the cup over a candle. Since carbon dioxide is heavier than air, the gas flowed out and extinguished the candle's flame.

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