Colour Changing Milk by Ethan
We want to find out…
How will different types of milk react to dish washing liquid?
I think it will mix when you put dish washing liquid because I was doing the dishes and a plate had colour and when I put wash liquid in it, it blasted.
What we need
What we will do
When the cotton bud with the dish washing liquid touched the milk, the colours moved away quickly and then swirled around and mixed together.
The whole milk worked faster than the trim milk. It moved away but it didn’t seem to swirl as much.
What we found out
That soap gets rid of fat.The trim milk has less fat than the whole milk.
What is the scientific thinking?
The milk has fat in it and soap grabs on to it and it tries to get rid of the fat then it blasts around the milk in the plate.
The dish soap does not mix with the milk. Instead it floats on top and spreads over the surface. As it spreads, it grabs the food colouring. Soap is a "egreaser" so the molecules in it are attacking the fat in the milk, causing motion which creates the swirling of the colours.