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Magic Milk Experiment Worksheet
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Magic Milk Experiment Worksheet
Find out what happens when dishwashing liquid touches food colouring in milk. Work with an adult. You will need a shallow plate, whole milk, food colouring, dishwashing liquid, cotton buds and paper towels. Pour enough milk to cover the bottom of the plate. Add a few drops of different food colours near the centre. Dip a clean cotton bud in dishwashing liquid, then gently touch its tip to the milk near the colours. Watch closely. Do not drink the milk, and wash your hands when you finish.
Plan and predict
Make a prediction before adding the dishwashing liquid.
1.Before you start, what do you think the food colouring will do when the cotton bud touches the milk? Give a reason for your prediction.
2.Choose the safest way to use the materials during this investigation.
- Taste a drop of milk to check whether it is fresh.
- Keep the materials away from your mouth and wash your hands afterwards.
- Pour leftover milk down the table.
3.Complete the procedure sentence: Add the food colouring to the milk before you touch the surface with a cotton bud dipped in .
Observe and record
Look carefully at the milk before and after the cotton bud touches it. Record what you actually see.
4.Describe what happened to the food colouring when the dishwashing-liquid cotton bud touched the milk. Include at least two details about its movement, pattern or colours.
5.Which is an observation rather than a prediction?
- I think the colours might spread.
- The blue colour moved in a curved streak after the cotton bud touched the milk.
- The colours will probably mix.
6.True or false? A fair observation describes what you saw, even if it is different from your prediction.
TrueFalse
7.Did your result match your prediction? Choose one, then give one piece of evidence from what you observed.
8.Match each investigation word with its meaning.
- Prediction
- Observation
- Evidence
- What you notice using your senses
- What you think may happen before you test
- Details from your observations that support an idea
9.Suggest one change you could make in a new test to investigate the milk-and-colour effect more carefully. Say what you would keep the same so the comparison is useful.
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