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Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.
- 5 to 10 minutes
- 5 to 10 minutes
- 1 cent - $1 per student
- Ages 6 - 18
- Activity
- English
Quick Guide
Materials List (per student)
- Water
- Vegetable oil
- Isopropyl alcohol (70% or 91%)
- Non-iodized or kosher salt
- Empty, clear bottle with cap or lid—smooth-walled bottles work best
- Food coloring
Subjects
-
Physical Sciences
-
States of Matter
- Liquids
-
Structure and Properties of Matter
- Volume and Density
-
States of Matter
Other
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Access Rights:
- Free access
By:
Rights:
- Creative Commons: Non-commercial Share Alike (by-nc-sa), Exploratorium Teacher Institute,