On Friday students watched/participated in a demonstration of wind, water, and ice erosion. Students watched as a student blew across some sand with a straw. They were able to observe the movement of the sand as it started to build little mounds similar to sand dunes. Students then watched as moving water from a hole in a paper cup began to carve a stream through the sand. Finally, students observed as a cup of ice, representing and glacier, moved back and forth across some flat clay. Students noticed that small pieces of clay became attached to the ice and that the ice made small cuts in the clay. After completing this activity students brainstormed ways in which humans can act as agents of erosion.
Fifth graders at Banneker have experienced their 15 minutes of fame!!! The fifth graders of 2011-2012 were in the Middleburg Life September issue celebrating the 1st annual Banneker Trashion Show! I hope that the article got the wheels a turnin' for 2012-2013 fifth graders as they begin to think about this year's trashion show. Explicit directions for this activity will come out shortly.
In this lab students were testing to see how many drops of water they could get to fit on a penny. As they dropped the water on the penny they noticed that a little bubble was forming over the penny. On the second day students tried to fit as many drops of soapy water on the same penny, heads side up. Students determined that not quite as many drops were able to fit on the penny using soapy water. After completing the experimentation portion of the penny lab students observed a demonstration of surface tension using a cardboard boat. Students pondered what it would take to get the cardboard boat to move straight across the water without touching the boat. Finally, we decided as a class to put a drop of soapy water behind the boat. We were able to watch it zoom to the other side of the pan! When we tried to repeat the demonstration it would not work. Students determined that once the surface tension is broken the experiment will no longer work.