Tuesday, February 7, 2012

Green Milk?!

We experimented with another type of reaction in science on Monday, and I wanted to post some pictures of it.  This was a new one to me, but it actually worked really well. First, each person got a little dish of 2% milk. Then, we added a few drops of liquid food coloring to the top of the milk.
Next, we took popsicle sticks and got a little bit of Dawn dish soap on the end. 
When we gently dipped the end of the stick in the milk, the colors immediately raced away from the stick. 

This has to do with the fact that the dish soap weakens the chemical bonds that hold the proteins and fats in the solution. The soap molecules race around to join up with the fat molecules, and the food coloring molecules get bumped around in the process.  This reaction does end up looking pretty cool!
Tomorrow I'll be posting some of the other things we're doing this week.  I know right now the blog makes it look like we just do science experiments all day, so I'll take some pictures of our writing, art, and other activities. 
Have a great night!

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