3rd Grade Group:
The girls did some really fun activities today while learning the difference between a chemical reaction and a chemical mixture. First, we made playdough, a chemical mixture made using ingredients that you can find at home (flour, salt, oil, vinegar and water). After having some fun with our creations, we set off baking soda and vinegar volcanoes! The volcanoes are an example of a chemical reaction, to contrast the chemical mixture we made earlier.
4th/5th Grade Group:
Today the girls learned about the relationship between temperature and the volume of a gas. We then used our knowledge to "magically" inflate balloons. For one experiment, we put hot water into a plastic bottle and shook it around, then we emptied the bottle and placed a balloon over the mouth of the bottle. When we stuck the bottle into a bowl of cold water, the balloon inflated inside of the water bottle! This is because as the air in the bottle gets cooler, it contracts and sucks the balloon into the bottle.
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.
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.
Week 4: November 3rd, 2010
3rd Grade Group:
This week the 3rd graders created beautiful crystal gardens! After learning all about what crystals are, the 3rd graders mixed bluing, salt and ammonia together to make their basic crystal solution. They added food coloring to give their crystals some color and then added a piece of charcoal as a seed for the crystal to begin growing. The girls are very excited to see what their crystals will look like next week after having a chance to grow!
4th/5th Grade Group:
The 4th graders did a variety of experiment to explored the amazing properties of dry ice. We learned the concept of "sublimation" and how that is key to many of the abilities of dry ice. For one experiment, we carefully put a piece of dry ice into a plastic bottle and then added water. We put a ballon over the mouth of the bottle and watched as the balloon slowly filled up with carbon dioxide released by the dry ice. Next we added soap to the mix, creating soap bubbles filled with dry ice "fog". Finally, we found that if a penny was pressed against dry ice, it produced a screeching sound!
This week the 3rd graders created beautiful crystal gardens! After learning all about what crystals are, the 3rd graders mixed bluing, salt and ammonia together to make their basic crystal solution. They added food coloring to give their crystals some color and then added a piece of charcoal as a seed for the crystal to begin growing. The girls are very excited to see what their crystals will look like next week after having a chance to grow!
4th/5th Grade Group:
The 4th graders did a variety of experiment to explored the amazing properties of dry ice. We learned the concept of "sublimation" and how that is key to many of the abilities of dry ice. For one experiment, we carefully put a piece of dry ice into a plastic bottle and then added water. We put a ballon over the mouth of the bottle and watched as the balloon slowly filled up with carbon dioxide released by the dry ice. Next we added soap to the mix, creating soap bubbles filled with dry ice "fog". Finally, we found that if a penny was pressed against dry ice, it produced a screeching sound!
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