This week we are doing a Science Sunday reboot! We are redoing an experiment (Crashing Colors) that we did back in season one. Anthony is taking great interest in science now a days and since we weren’t really happy with the original video we thought we would do a reboot this week. You may also know this experiment as magic milk. Check out the original experiment here.
This week we are going to explore color and the reaction soap has liquid food coloring in milk. Are you ready to experiment with color?
What you will need:
Red, Blue, and Yellow liquid food coloring,
Liquid Dish Detergent
What to do:
- First fill up the cereal bowl with milk, not quite to the top.
- Gently add a few drops of red color into the milk in a small spot at the edge of the dish.
- Repeat with blue and yellow, moving around the dish’s edge so that each color is as far from the other two colors as you can make it. DO NOT stir the milk or jiggle the bowl! What do you think is going to happen when you add the detergent?
- Write down your prediction in your journal.
- Slowly pour a little detergent into the middle of the bowl.
- Draw and color a picture in your journal of what you see.
How does it work?
Just like water, milk is made of molecules, tiny pieces that stick together. They stick so closely that when you put in the food coloring, the food coloring (for the most part) just sits on top of the milk. Scientist call this surface tension, the molecules stick together as if there is an invisible skin across the top of the milk. When you add detergent to the milk, it pulls the milk molecules apart so that the surface tension is weakened. The milk and detergent molecules move around, and so does the food coloring! Where the colors mix, you may see a little green, orange, and purple.
Check it out in action:
Let us know!
We would love to see you doing the experiments!