Challenge 017 · Ages 8–14
Density Rainbow
Layer liquids of different densities.
Recommended Guided Learning Time: 1.5 hours
Learners may require additional or fewer hours depending on age, prior experience, pace and the level of development they choose to take their project to.
Primary STEAM area
Science
The Challenge
What will your learner investigate?
Can you create a stable rainbow by layering liquids according to density?
Learning outcomes
- Define density through comparative observations.
- Predict and test the order of different liquids.
- Record results and explain why layers form.
Connected learning
Science: density and liquids; Mathematics: volume and ordering; Art: colour composition; English: scientific explanation.
Dream Areas
Prepare for this Challenge
What you'll need
Here's what may be useful for completing this activity. Requirements may vary depending on the learner, activity format and equipment available.
Materials & consumables
- Honey or syrup
- coloured water
- vegetable oil
- other compatible test liquids.
Equipment, tools & software
- Clear tall container
- pipettes
- measuring cylinder
- tray.
Safety & preparation
- Check allergies
- do not ingest
- use plastic containers for younger learners.
These preparation notes support planning and do not replace a project-specific risk assessment or appropriate adult supervision.