Marvellous Moving Milk. What if.... we tried it with cream.

We re-visited our experiment from last week.  We found out about Molecules.  We looked at pictures of molecules in the internet.  We tried to think of something that wasn't made of molecules and we couldn't.  We role-played being the milk molecules and the red and blue food colouring.  We stared thinking about how the dish washing liquid changed the way the molecules held together. 

Then we thought about how cream might react.  We thought cream was thicker and stickier.  We thought that there would still be circles and movement but slower movement than for milk. We talked about how cream has more fat molecules than milk.  We thought they might be heavier to move around.

This is what we saw.

We repeated our results with milk

Then we tired our experiment with cream

Nothing happened!  We were amazed.  Someone suggested that we add more food colouring and then more dish washing liquid but still nothing happened.  After about 5 minutes we noticed that the colouring had sunk to the bottom and spread out to create a layer which the cream sat on top of. 
We dropped the cotton bud into the mix because we had given up.  Then we noticed some tiny circular movement.  At last something was happening but no where near as fast or as big as the movement with milk.