This week we completed our very first experiment as part of our Science-based Inquiry. Here are the instructions in case you’d like to have a go at home.
What you need:
- 1 cup full-cream milk
- 4 different food colourings
- Dishwashing liquid
- A medium-sized bowl (we used plastic plates)
- Cotton bud
What to do:
- Pour the milk into the bowl.
- Place one drop of each of your colours into the milk, keep the drops close together.
- Dip the cotton bud into the dishwashing liquid.
- Dip the cotton bud into the milk.
- Watch the colours swirl around.
Here is a youtube clip that we watched showing the experiment.
We worked in groups and were able to create some really beautiful patterns in the milk.
Here are some of our observations:
I saw colours moving into the milk and they were swirling around. Olivia
I saw a green circle. Maddex
I saw lovely colours and it was cool. Mikayla
During the milk experiment I saw the colours swirling. Fletcher
I saw a rainbow. It was colourful. Sidney
When I put the dishwashing liquid in, the dye ran away. Riley W
I saw that when we put the dishwashing liquid in with the milk and food colouring, the food colouring ran away and made awesome patterns. Sarah
I saw lots of patterns and colours. Jamieson
I saw lots of colours. Cohen
I saw that the colours went into a star. Sienna
I saw a seahorse and a rainbow. Bradley
When I put drops in, it moved around. William
I saw the food colouring going away. Eve
I saw a rainbow star. It was green. Shayla
I saw colours drop in the bowl. It was beautiful. Madison
I saw a rainbow star and we mixed the colours. Lilah
When I put the dishwashing liquid in and the food colouring in, the green turned into a star. Salini
I saw a rainbow. Tyson
The detergent pushed the colours. Kody
When we mixed the cool coloured milk it went all rainbow coloured. Georgia
When we put the dishwashing liquid in it looked like it [food dye] was running away. Zoe
Why does it happen?
The fat and protein molecules in the milk are altered by the soap. This causes them to roll around. Once the soap molecules have mixed evenly with the fat and protein molecules in the milk the motion will stop. So keep adding drops of dishwashing liquid when the action slows down.