Science Experiment 1

Do you like to do Science Experiments in your classroom?  So do I.  We do Project Based Learning or STEM activities every Friday.  We call them Fun Fridays.  However, some Fridays I just don't have enough time to do an in-depth project or activity.  Sometimes, teaching gets in the way!  

But I promise my kids Fun Fridays, so I always have to do something.  Even if it is a simple 10 minute lesson.  

Do you need a quick activity?  Try doing this Dancing Raisins experiment.  All you need are some clear plastic cups, raisins, and sprite.  I buy a few 2 liters of Sprite (the kids like to drink it when finished), enough cups for everyone, and 1 bigger box of raisins (each kid really only needs 4 or so).
 
Here is how it works:
1.  Pass out Cups
2.  Put Sprite in Cups (about 3/4 of the way full)
3.  Ask students what they predict will happen if you put raisins in the sprite.  You will get some creative answers.
4.  Give them 3 or 4 raisins to drop in one at a time.  You might encourage them to not let their raisins touch when they drop them in.
5.  Ask them to watch what happens.  They will let up when the raisins dance.  
Here is an explanation as to what happens and why it works:
Raisins are denser than the liquid in the soda, so initially they sink to the bottom of the cup.  The carbonation releases carbon dioxide bubbles.  When these bubbles stick to the rough surface of the raisin, the raisin is lifted because of the increase in buoyancy.  
They will sink again over and over!
The best part....It only takes about 10 minutes to do.  They can even drink soda and eat raisins when finished. 

I usually do this activity the first week of school.  If you have a few minutes, give it a try.  Your kids will love it.

God Bless!

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