Hi, I’m Miss Alicia from Charlotte Mecklenburg Library, and I’m also a member of children’s services. And for this segment of rookie science, we are going to do an experiment with milk, dishwashing liquid, and food coloring.
So, let’s talk about what we know about the ingredients. Milk is a liquid that is used for human consumption, it comes from cows. We can drink it and cook with it. It contains proteins, minerals, fat, and water. Dishwashing liquid is used for cleaning dishes. It is designed to break down fat, grease, and oil. And food coloring changes the color of food.
In this Styrofoam container, I have milk. And now I’m going to add blue, green, and red, and yellow food coloring. We want to make sure not to shake it. Take your cotton swab, and dip it into the dishwashing liquid. And make sure it’s not dripping. Now place the cotton swab in the center of the milk, and be sure not to stir. And whoa! Look at that burst of color! Adding it made the milk move. Did you figure out what’s going on?
The secret is the fat in the milk and its interaction with the dishwashing liquid. The same thing happens when you wash dishes. The dishwashing liquid is breaking the fat in the food to get the dishes clean.
Let’s see what happens when we use water. As you can see, it’s not quite the same reaction because there’s no fat content in water. See if you can change the outcome by changing the variable. Maybe next time you can use two percent milk or skim milk or different dishwashing liquid to change the outcome. Thank you for watching!