Tuesday, April 7, 2009

Science Club Fridays: Seeing DNA and Making Butter

The boys belong to the Summitview Science Club, which meets once a month on Fridays. Science Club families rotate hosting science experiments/activities and this month was our turn. : ) We hosted a Seeing DNA Science Day...with a Making Butter activity as a back up for younger siblings. Nevan here is shaking heavy cream with salt, to separate the buttermilk from the fatty cream that will clump to form butter globs. Very delicious...homemade butter!



The Seeing DNA experiment consisted of extracting DNA strands from an onion. This was a longer experiment that required chopping onions, mixing in dish detergent, straining and removing solids from liquids, removing foam, adding denatured alcohol, and waiting for the DNA to magically appear. : ) The kids were patient, as the whole process was long, with waiting periods in between. The end result was that we were able to see the DNA strands under a microscope and by golly they really do look spirally and twisted. : ) In this photo, Nevan and Silvio and a friend are straining the liquid from the onion solids into a bowl, and it is in this liquid that the DNA can be found. We all look forward to the next Science Day!


Posted by Picasa

No comments: