Sunday, September 16, 2012

Dancing Raisins - Bubbles Science Experiment

I saw a friend's blog posting on dancing raisins and I wanted to do the experiment with Lillie and Sophie.  I found this website with more information  I think that this was one of my favorite experiments.
First, we read and discussed the following page..
Then we conducted the experiments.
We filled 5 clear glasses about 3/4 of the way full with Sierra Mist.  But you can you can use your choice of clear carbonated beverage.
We selected 5 items to put in the glasses.  Uncooked macaroni, raisin, uncooked wild rice, uncooked lentils, and corn from a can.
In the first glass Lillie added the macaroni.  We used macaroni from the kraft mac and cheese box.  Some floated at the top and some sank to the bottom.  A few went up in down.  I think that this one would have been better, if we would have used regular elbow macaroni.
Next, Lillie dropped the raisins into the second glass.  They sank to the bottom, then slowly rose to the top.  When their bubbles popped, they sank back to the bottom of the glass.  Once the collected enough bubbles, they rose to the top again.  You can tell that this was more exciting, by the smile that I captured on Lillie's face as you look through the glass of raisins.
In the third glass, Lillie added wild rice.  It sank, then floated back up to the top.  It did not fall back down to the bottom of the glass. (I did not take a picture of it).  It did not dance.
In the forth glass, Lillie added the corn.  It slowly moved from the bottom of the glass, back to the top and then back to the bottom.
In the fifth glass, Lillie added the dry lentils.  They danced the most out of all of the items.
Then Lillie proposed that we add corn to the glasses with the rice, raisins and macaroni. Once she added the corn to the glass with rice, it disrupted it enough to cause both the rice and corn to dance from the bottom to the top and back down to the bottom.
The corn did not change the dance that the raisins or macaroni were doing.  They still slowly continued to dance from the bottom to the top and back down to the bottom.
The best part was drinking the unused Sierra Mist.  Those bubble rose to the top the form of a burp.
In conclusion, the CO2 bubbles attached themselves to the solid objects, causing them to to rise to the top.  Once they made it to the top, some of the bubbles popped causing the solid object to fall back down to the bottom of the glass.  The process would repeat itself, until there were no more bubbles/CO2 or the objects became to saturated and heavy to have the CO2 lift them to the top.
After the experiment, we read this book to learn about bubble in nature.
Here is a list of the Linky parties that I link up to.  Thank you to all of the hosts for letting me post my favorite recipes, crafts, money saving ideas and activities for children.

Sunday - 
Monday -

Tuesday -



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