Magic Milk Experiment Worksheet
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Magic Milk Experiment Worksheet
Test the magic milk
Equipment: a shallow dish, whole milk, food colouring, dishwashing liquid, and cotton buds. Method: Pour milk into the dish. Add small drops of different food colours. Dip a clean cotton bud in detergent, then touch its tip gently to the milk near a colour drop. Watch for 30 seconds. Repeat with a fresh cotton bud in another spot. Keep the dish still and change only one thing at a time.
What happened?
The club team recorded these observations: before detergent, the colour drops showed little movement. When detergent touched the milk, nearby colours quickly moved away from the touch point, swirled and mixed. After a while, the movement slowed.
- Stayed mostly in place
- All sank to the bottom
- Turned white immediately
- Moved to the edge by themselves
- Nearby colours moved away, swirled and mixed
- The milk instantly froze
- The colours disappeared without moving
- Nothing changed
- Use the same milk, dish and colour drops, but vary only the number of detergent drops
- Change the milk, dish, colours and detergent amount each time
- Use a different dish and different milk for every test
- Add detergent and stir in one test, but do neither in the other
- What is changed
- What is observed
- Something kept the same
- How the colours move
- Whether detergent touches the milk
- The dish and amount of milk
- Detergent interacts with the milk’s surface and changes how the surface behaves, creating movement that carries the colours
- The colours are alive and run away
- Detergent makes the milk boil
- The cotton bud pushes every colour around the whole dish
2 printable pages
Page 1
Page 2
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